Change IMEI? - Galaxy S6 Edge Q&A, Help & Troubleshooting

Is it possible to change the IMEI of the phone? I have the korean version and I want to use it in UK

I don't think IMEI has anything to do with where you want to use the phone. It more likely has to do with what bands your device utilizes. Also, I don't think changing the IMEI is legal anyways and if so, it won't be something easy for you to find.

KAwAtA said:
I don't think IMEI has anything to do with where you want to use the phone. It more likely has to do with what bands your device utilizes. Also, I don't think changing the IMEI is legal anyways and if so, it won't be something easy for you to find.
Click to expand...
Click to collapse
Interesting, in terms of using a korean phone, I just like the outside look it's a special edition, is it realistic to take it apart and replace the parts with that of a normal S6 Edge?

Depends which model you have
In terms of 2G/3G it should work in UK
4G definitely not gonna work as the band is different
Taking apart for s6 edge is not a easy job if you aren't a repairman
I guess first you need to see if the phone is unlocked, then if it has roaming capability in UK, then usually should work but no LTE
Sent from my iPad using Tapatalk

ytwytw said:
Depends which model you have
In terms of 2G/3G it should work in UK
4G definitely not gonna work as the band is different
Taking apart for s6 edge is not a easy job if you aren't a repairman
I guess first you need to see if the phone is unlocked, then if it has roaming capability in UK, then usually should work but no LTE
Sent from my iPad using Tapatalk
Click to expand...
Click to collapse
It's the S6 Edge Iron Man edition released in south korea. I am not sure if the band is different, is band hardware or firmware?
Someone told me I need something called Z3X Box or something.
Would it be possible to use my edition in the UK? Is changing the IMEI not possible for privacy reasons?

No
It's like, can you change the VIN for your car for privacy reason?
Obviously not
I know that one, it will work but no LTE, I guess it's G925F but no promise there, do some research on YouTube probably you can get the answer
Sent from my iPad using Tapatalk

SpeedThrash155 said:
Is it possible to change the IMEI of the phone? I have the korean version and I want to use it in UK
Click to expand...
Click to collapse
It's not like with MTK CPU based phones where you can do it by software.
The only way possible is by replacing the whole mainboard and getting therefore a new IMEI.

KAwAtA said:
I don't think IMEI has anything to do with where you want to use the phone. It more likely has to do with what bands your device utilizes. Also, I don't think changing the IMEI is legal anyways and if so, it won't be something easy for you to find.
Click to expand...
Click to collapse
Actually IMEI has nothing to do with bands. IMEI is basically like a license plate of a car. It's a certification number given to every phone with a cellular band. It allows to trace back the phone to where it was certified, where it was built and what model it is. It serves no other purpose than for identification.

polish_pat said:
Actually IMEI has nothing to do with bands. IMEI is basically like a license plate of a car. It's a certification number given to every phone with a cellular band. It allows to trace back the phone to where it was certified, where it was built and what model it is. It serves no other purpose than for identification.
Click to expand...
Click to collapse
You misread what I said. His PROBLEM has to do with the bands, not the IMEI......... whoosh

KAwAtA said:
You misread what I said. His PROBLEM has to do with the bands, not the IMEI......... whoosh
Click to expand...
Click to collapse
actually its both, the bands is the main one, the IMEI might be blocked too, how hard is it just to switch out the insides?

Mod Edit
Changing an imei is illegal
Please do not discuss such things on XDA
Thread closed
malybru
Forum Moderator

Related

Can I change the IMIE and dumb my atrix 4g down to just "mobile web"

Not trying to cheat AT&T​
I have an unlocked, rooted Atrix 4g that has reached the end. The wifi is not working and from what I have found apparently there is a battery inside there that dies or needs to be reset... I don't know. BUT rather than just toss it I would like to dumb it down. I don't want to leave it even picking up 3g, dumb it down to a "mobile web" only and allow my sister to use it. It doesn't matter what ROM it has, or what it really behaves like when I'm done. It would be cool if everything (camera and such) worked but if it never ventures off of 2g or ATT's "mobile web" that is perfect. But even if I find a rom that will turn it into a pretty prepaid phone ATT will see the IMIE and assume it's using it's full potential. Is there a way to dumb it down and make the imie number show something else. I don't want to get tossed from the forums so I will say once again that I do NOT want to steal service, I want the phone to only be a 2g phone anyway! Any suggestions would be awesome!
No way.
I understand what you are saying, but I believe this is illegal.
Yeah, changing IMEI is illegal in most countries, including yours. The only option I can think of right now is to SIM unlock it if necessary (try calling AT&T support, they might provide the unlock code if the phone meets certain conditions, that's how I unlocked mine) and then use it with some other carrier that doesn't care about IMEIs (Verizon? Sprint? dunno, I'm not american).
Straight talk would work.
ravilov said:
Yeah, changing IMEI is illegal in most countries, including yours. The only option I can think of right now is to SIM unlock it .
Click to expand...
Click to collapse
Yep, I have it unlocked already. I guess I will try att. I just hate to throw the thing away because it doesn't pick up WiFi. I had it sold to a good home when that issue popped up.
Sent from my SGH-I747 using Tapatalk 2

Has anyone checked if the AT&T 920 is really only quadband?

Can you even do that when it's locked? I'm just wondering about the remote possibility that all the NA versions are the same hardware but AT&T just says that theirs is quadband.
psalmu said:
Can you even do that when it's locked? I'm just wondering about the remote possibility that all the NA versions are the same hardware but AT&T just says that theirs is quadband.
Click to expand...
Click to collapse
I asked a Bellevue Square Microsoft Store employee in Bellevue, Washington. He said the 920 is pentaband. I asked him if it would work on T-Mobile and he said "Theoretically." Obviously the phone is still locked...
To be honest with you, I don't believe him 100%. It may be pentaband capable, but locked to quadband.
hawc1506 said:
I asked a Bellevue Square Microsoft Store employee in Bellevue, Washington. He said the 920 is pentaband. I asked him if it would work on T-Mobile and he said "Theoretically." Obviously the phone is still locked...
To be honest with you, I don't believe him 100%. It may be pentaband capable, but locked to quadband.
Click to expand...
Click to collapse
Total guess here, but I seriously doubt that these 920's for different carriers are going to be limited at the hardware level. I imagine the most cost efficient method for making these things is using a single design, same chips all around. Then, you lock it down via software.
I am sooo tempted to get one of these, but I refuse to buy from AT&T if they're going to hold me hostage. If the unlock is withheld during the exclusivity period, maaybe I can see that... but if they won't do it after that, I would be seriously pissed. I am on Tmo now, and it makes more sense for me to get the 8x Global phone ATM.
charlatan01 said:
Total guess here, but I seriously doubt that these 920's for different carriers are going to be limited at the hardware level. I imagine the most cost efficient method for making these things is using a single design, same chips all around. Then, you lock it down via software.
I am sooo tempted to get one of these, but I refuse to buy from AT&T if they're going to hold me hostage. If the unlock is withheld during the exclusivity period, maaybe I can see that... but if they won't do it after that, I would be seriously pissed. I am on Tmo now, and it makes more sense for me to get the 8x Global phone ATM.
Click to expand...
Click to collapse
I'm almost certain that all variants have the same hardware. I won't get the AT&T version no matter what since it has its logo branded on the top-left corner of the phone.
Seriously, I hate American companies for doing that...
hawc1506 said:
I won't get the AT&T version no matter what since it has its logo branded on the top-left corner of the phone.
Click to expand...
Click to collapse
I was going to try a Dremel with a polishing wheel for that problem if only the frequencies are right and you can get it unlocked.
psalmu said:
I was going to try a Dremel with a polishing wheel for that problem if only the frequencies are right and you can get it unlocked.
Click to expand...
Click to collapse
The logo is built into the glass. It's not printed on the surface
Obnoxious carrier branding is really unsightly. I seriously hope Telstra does not do this in my country.
Personally I'm pissed the AT&T one is locked because I want that glorious cyan matte finish.
Really seems like there is only one flavour of the 920 and it is pentaband.
hawc1506 said:
The logo is built into the glass. It's not printed on the surface
Click to expand...
Click to collapse
[email protected] Oh well, I just might be able to live with the logo if it otherwise works. So, back to the original subject: anybody know if it's possible to really verify the bands while a phone is locked and if it's possible, could at least one of the vast horde who already have the AT&T version please do it?
psalmu said:
[email protected] Oh well, I just might be able to live with the logo if it otherwise works. So, back to the original subject: anybody know if it's possible to really verify the bands while a phone is locked and if it's possible, could at least one of the vast horde who already have the AT&T version please do it?
Click to expand...
Click to collapse
It's more difficult for you guys in the US because TMobile has old frequencies that will still be detected by the phone (ie. 2G). It's easier here in Canada because Wind has no fallback frequencies outside of the AWS spectrum. Basically, if you go into the manual network selection screen and see Wind you know the phone supports AWS.
geoken said:
It's more difficult for you guys in the US because TMobile has old frequencies that will still be detected by the phone (ie. 2G).
Click to expand...
Click to collapse
Doesn't WP8 show anywhere the connection speed like E for Edge or 3G?
Well I can confirm that it works with 3g speeds on t-mobile except it's shotty... my phone will go to E randomly and the only way to fix it is to go to settings for cellular and switch data speed options. Which is lame. The phone is defective anyway cause the headphone jack doesnt always work so it's going back.
Wish I didn't pay for next day saturday delivery. Annoying.
radlink14 said:
Well I can confirm that it works with 3g speeds on t-mobile except it's shotty... my phone will go to E randomly and the only way to fix it is to go to settings for cellular and switch data speed options.
Click to expand...
Click to collapse
Maybe you're in an area where T-Mo is refarming their bands to include 1900 MHz? That could explain spotty 3G, even if the phone doesn't have the 1700 MHz band enabled.
We're you using a T-Mobile SIM or roaming or what?
Did you unlock to try on T-mobile US? I am with everyone here that I want to to stay with T-mobile's lower rate, but really want the 920.
Sent from my HD7 using XDA Windows Phone 7 App
Nokia lists the supported frequencies on the box, I would check that first to see if it's even listed as pentaband.

Note Logic Board Replace?

Hello to all
Yesterday I go to shop near my home the fix androids and iPhones and the tech tell me maybe is good idea replace the board (IMEI us different from the back and can't get signal in simple mobile same as Tmo well my question is how I really know if the board is damage?
Thanks in advance for any help!
Sent from my SAMSUNG-SGH-I727 using Tapatalk 2
Well have you tried different modems as well as the correct APN settings for those carriers?
I do not know how this "repair shop" gets their hand on the logic board to begin with.
I had been looking for a logic board, but NO ONE has it. Not even the supplier of Samsung repair parts. It is not for sale.
So, it sounds like they may be trying to trick you and charge you a big bill to "fix" it, when the solution is most likely as simple as flashing a different modem.
rquiett said:
Well have you tried different modems as well as the correct APN settings for those carriers?
Click to expand...
Click to collapse
Yes Sir but let me try it again so if the APN is incorrect this matter on signal and calls? i mean with my skyrocket i never put the APN phone automatically loads (Tmo apn not simple mobile) and works better than the simple mobile itself
ddochi11 said:
I do not know how this "repair shop" gets their hand on the logic board to begin with.
I had been looking for a logic board, but NO ONE has it. Not even the supplier of Samsung repair parts. It is not for sale.
So, it sounds like they may be trying to trick you and charge you a big bill to "fix" it, when the solution is most likely as simple as flashing a different modem.
Click to expand...
Click to collapse
maybe but i flash various radios and roms with no luck BTW did you can recoemnd me a "work" rom/radio combo?
update: my friends test this with their att sim card and works perfect (4g LTE) not sure why not work on (Tmo) i test with Claro too try to make a calls but freeze, laggy and screen goes black sometimes can talk but then signal drops :crying:
So exist a software or code to test the phone internal hardware?
Sent from my SAMSUNG-SGH-I727 using Tapatalk 2

Gear S Dialer Codes, Service Mode

Hey guys and gals I was dabbling around and got curious and used the S4 Dialer Codes from that forum and they also (most of them) work on the Gear S, so maybe we can also try and tweak these little device's from the service menus like our phones, see my screenie for proof, I used *#0011# and also tried *#197328640# and it works too, I don't know a whole lot about the functions within these menus and I know that if you mess around in there you can really screw up your device so TRY AT YOUR OWN RISK I AM NOT RESPONSIBLE IF YOU BRICK OR DAMAGE YOUR DEVICE!..I just wanted to point this out since I didn't see any threads or topic about this yet and maybe a DEV can jump in to provide some guidance as to the functions within these service menus.
S4 Dialer codes forum.
http://forum.xda-developers.com/showthread.php?p=48222157
Ok just browsing through the menus and if you select [4] Reserved just look what's in there! and although this is the only setting that would not enable does this mean it is possible to enable it via software? Could LTE be built in awaiting another software enabling update like other sammy devices? that would be pretty slick! an LTE Smart Watch!
doesnt the t mobile version already have LTE? Thats how they are advertising it..
No, none of the Gear S has LTE. Don't confuse '(fake)4G' with LTE.
wow, shocked that a mobile company would engage in deceptive advertising! :cyclops:
actually, its a non issue, considering how little actual data use most will be using with a smart watch at this point..
wase4711 said:
doesnt the t mobile version already have LTE? Thats how they are advertising it..
Click to expand...
Click to collapse
From what I can see the only symbol that pops up on my t-mobile Gear S is 4G, but my question is why would LTE band selection be inactive within the service menus, none of the previous gear watches had LTE so why would it be in there? And its funny how selection 4 says reserved where the LTE selection is.
dawgboy1783 said:
From what I can see the only symbol that pops up on my t-mobile Gear S is 4G, but my question is why would LTE band selection be inactive within the service menus, none of the previous gear watches had LTE so why would it be in there? And its funny how selection 4 says reserved where the LTE selection is.
Click to expand...
Click to collapse
The LTE is likely showing because it has a Qualcomm Snapdragon 400 chip in it. That chipset supports LTE as well as dual mode GSM/CDMA (e.g., the same watch would work on Verizon as well as AT&T), as well as quad-band GSM (850/900/1800/1900), but that doesn't mean the radios are actually in it.
That menu is very likely a holdover from the S400 operator menus in other devices. Manufacturers tend to be lazy when it comes to modding things like that.
Of course, until there is a teardown we don't really know what all is inside this watch. Also, the previous Gears didn't have the same service menus because they don't have chipsets that support independent cellular radios.
sbrownla said:
The LTE is likely showing because it has a Qualcomm Snapdragon 400 chip in it. That chipset supports LTE as well as dual mode GSM/CDMA (e.g., the same watch would work on Verizon as well as AT&T), as well as quad-band GSM (850/900/1800/1900), but that doesn't mean the radios are actually in it.
That menu is very likely a holdover from the S400 operator menus in other devices. Manufacturers tend to be lazy when it comes to modding things like that.
Of course, until there is a teardown we don't really know what all is inside this watch.
Click to expand...
Click to collapse
I can agree with you and for sure a tear down would be a good source of information.
dawgboy1783 said:
I can agree with you and for sure a tear down would be a good source of information.
Click to expand...
Click to collapse
I asked iFixIt and they say they are too busy ... which is shocking to me given what's inside of this watch ... Somehow the Kindle Voyage is more important to them ... HAH.
I don't know what the deal is but the media is REALLY resistant to the Gear S. And I don't like that at all.
sbrownla said:
I asked iFixIt and they say they are too busy ... which is shocking to me given what's inside of this watch ... Somehow the Kindle Voyage is more important to them ... HAH.
I don't know what the deal is but the media is REALLY resistant to the Gear S. And I don't like that at all.
Click to expand...
Click to collapse
Surprisingly the user manual from the UK site HAS disassembly instructions in the last few pages.
Ostensibly this was for replacement of the battery......
Doesn't seem very difficult. Remove the screen, and everything else is right underneath.
joytest said:
Doesn't seem very difficult. Remove the screen, and everything else is right underneath.
Click to expand...
Click to collapse
Try it and let's us know. Hehe

" No Network" issue UK

Hi everyone
I am in the UK and bought the Note 4 Global version, as in the UK my provider uses Band 20
I am on Tesco, which piggy-backs the O2 network
However, on inserting the sim I receive the No Network error.
Tesco give me the usual "we don't sell those handsets so we can't provide technical support blah blah" "It must be locked blah blah"
The sim is fine as it was in his iPhone 5 (and still is because this won't connect to Tesco)
The Mobile Networks setting has been changed to what was on the previous phone, but with no joy.
Any ideas anyone?
Thanks in advance
Edit for stupidity:
Android 7.0 NRD90M
MIUI ver 9.0.5.0
Have you tried any other sim card in the phone? You can get one of those cheapie PAYG sims (for example, EE) from Tesco or your corner shop and see whether it has the same problem (which might point to a hardware issue or something funny going on with your ROM). I am not sure why you would have had to change the mobile networks setting. That should not be necessary at all.
DarthJabba9 said:
Have you tried any other sim card in the phone? You can get one of those cheapie PAYG sims (for example, EE) from Tesco or your corner shop and see whether it has the same problem (which might point to a hardware issue or something funny going on with your ROM). I am not sure why you would have had to change the mobile networks setting. That should not be necessary at all.
Click to expand...
Click to collapse
Forgot to mention this is my son's phone.
I have an EE pay monthly sim. Tried that. Same thing. No Network.
Irony in the fact that it says TESCO 4G in the top band by the clock when he puts his sim in the Note 4 and 2 bars on connection.
Cannot ring out and cannot accept a call
o1nk said:
Forgot to mention this is my son's phone.
I have an EE pay monthly sim. Tried that. Same thing. No Network.
Irony in the fact that it says TESCO 4G in the top band by the clock when he puts his sim in the Note 4 and 2 bars on connection.
Cannot ring out and cannot accept a call
Click to expand...
Click to collapse
Silly question, are you sure it's global version? A lot of "global" word from Chinese phones.
Is this the package?
o1nk said:
Forgot to mention this is my son's phone.
I have an EE pay monthly sim. Tried that. Same thing. No Network.
Irony in the fact that it says TESCO 4G in the top band by the clock when he puts his sim in the Note 4 and 2 bars on connection.
Cannot ring out and cannot accept a call
Click to expand...
Click to collapse
Ok, it definitely should work with EE, and so this is clearly not a Tesco mobile problem. Either the hardware is faulty or the ROM (particularly the modem drivers) is faulty. You might want to return the phone.
Stevica Smederevac said:
Silly question, are you sure it's global version? A lot of "global" word from Chinese phones.
Is this the package?
Click to expand...
Click to collapse
I have the same sticker in the same corner
I had to order the Global specifically for the Band 20 in the UK
Any way to tell if it's not?
DarthJabba9 said:
Ok, it definitely should work with EE, and so this is clearly not a Tesco mobile problem. Either the hardware is faulty or the ROM (particularly the modem drivers) is faulty. You might want to return the phone.
Click to expand...
Click to collapse
Darth, I think you may be onto something. You just triggered something I read earlier
Is this the same issue?
https://xiaomifirmware.com/guides-and-tips/fix-missing-network-issue-redmi-4/
o1nk said:
I have the same sticker in the same corner
I had to order the Global specifically for the Band 20 in the UK
Any way to tell if it's not?
Click to expand...
Click to collapse
Try this https://play.google.com/store/apps/details?id=net.simplyadvanced.ltediscovery
I suppose that the sim card is 4g card, right?
o1nk said:
Darth, I think you may be onto something. You just triggered something I read earlier
Is this the same issue?
https://xiaomifirmware.com/guides-and-tips/fix-missing-network-issue-redmi-4/
Click to expand...
Click to collapse
It looks like the same issue (on a different Xiaomi phone). The solution is probably the same - flashing the appropriate modem (firmware) files, or flashing a new complete ROM. I wasn't sure you wanted to go down that route, as it would give the vendor an escape route if something goes awry, or if the process doesn't solve the problem.
Stevica Smederevac said:
Try this https://play.google.com/store/apps/details?id=net.simplyadvanced.ltediscovery
I suppose that the sim card is 4g card, right?
Click to expand...
Click to collapse
His is a 6GB Tesco 4G and mine is a 40GB Virgin/EE 4G
His sim states Tesco 4G in top right, my EE states No Service.
LTE Discovery. What am I looking for in there?
In the Sim 1 section it says:
Band 20
GCI: 00144E78
PCI: 71
TAC: 16624
-110dBm
On Signals it says EARCFN (LTE Band 20)
Just been through my email confirmation and this is the one they sent me
https://www.geekbuying.com/item/Off...Note-4-4G-64GB-Smartphone---Black-379093.html
Now forgive me if I'm wrong but that says HK Stock Global
What's the difference between that and the Global Rom?
Darth, am I going down the flashing routine? Not bothered if I am as long as it works
Jesus H, it seems everything I buy I have to reflash these days.
M8 boxes, Kindle Fires, phones
o1nk said:
His is a 6GB Tesco 4G and mine is a 40GB Virgin/EE 4G
His sim states Tesco 4G in top right, my EE states No Service.
LTE Discovery. What am I looking for in there?
In the Sim 1 section it says:
Band 20
GCI: 00144E78
PCI: 71
TAC: 16624
-110dBm
On Signals it says EARCFN (LTE Band 20)
Click to expand...
Click to collapse
If the phone sees the signal and it does detect 4g ,than the phone is ok.
The problem is that 110db . That's practically dead zone. I would say your location is the problem. I know you said that Samsung has 2 bars but this is crappy phone .
Just to be sure, can you check in a a place with strong 4g signal?
Stevica Smederevac said:
If the phone sees the signal and it does detect 4g ,than the phone is ok.
The problem is that 110db . That's practically dead zone. I would say your location is the problem. I know you said that Samsung has 2 bars but this is crappy phone .
Just to be sure, can you check in a a place with strong 4g signal?
Click to expand...
Click to collapse
Believe it or not, Tesco has really strong 4G in my village. Never a problem on that carrier
EE however is ****. I have "H" on their network and -123 dBm
But I don't use my data at home
My main problem lies with the calls and texts not being able to be connected
It seems I have been sent a HK Global Rom? This has Band 20
Is this an issue? I am in the UK. Should I have been sent a Global Rom? But this doesn't have Band 20
Is it the modem driver issue as stated earlier?
o1nk said:
Believe it or not, Tesco has really strong 4G in my village. Never a problem on that carrier
EE however is ****. I have "H" on their network and -123 dBm
But I don't use my data at home
My main problem lies with the calls and texts not being able to be connected
It seems I have been sent a HK Global Rom?
Is this an issue? I am in the UK. Should I have been sent a Global Rom?
Click to expand...
Click to collapse
It should have come with global rom . I'm not sure though that it would effect frequency.
Try to change from global to lte/wcdma in preferred network
o1nk said:
Darth, am I going down the flashing routine? Not bothered if I am as long as it works
Click to expand...
Click to collapse
It seems that you will have to go down that route, unless you return the phone. Whether it works or not will depend on whether it is a hardware problem or just a ROM/firmware problem.
By the way, there is a firmware repository here: https://forum.xda-developers.com/showpost.php?p=73534612&postcount=89
This requires you to have TWRP recovery.
DarthJabba9 said:
It seems that you will have to go down that route, unless you return the phone. Whether it works or not will depend on whether it is a hardware problem or just a ROM/firmware problem.
By the way, there is a firmware repository here: https://forum.xda-developers.com/showpost.php?p=73534612&postcount=89
This requires you to have TWRP recovery.
Click to expand...
Click to collapse
Fired an email of to Geekbuying
See if they want me to send it back or give permission to add the modem drivers with warranty intact
Just noticed that with WIFI on it says I have Tesco 4G. When I turn WIFI off I have no service.
Bizarrely, after reading, this has been going on since the Note 3
Strangely, the phone is giving 4 bars for connectivity for calls. Yet you just try and a make a call
It's always my luck when people order from China and get this wonderful, working, all-singing all-dancing product ..... then I order one!
o1nk said:
It's always my luck when people order from China and get this wonderful, working, all-singing all-dancing product ..... then I order one!
Click to expand...
Click to collapse
These things are often a hit-and-miss affair, especially when buying from outside the EU. I bought mine (two) from eBay (UK and Ireland based sellers) - much easier to get refunds via PayPal (and more likely to get a proper Global ROM). But it is possible that your problem will be fixed by flashing the latest global stable ROM.
Update
Took it to the Tesco Phone Shop this morning and they couldn't get any of their settings to work. Consistently No Network. Wouldn't even connect to the Tesco guy's Vodafone sim.
Tried a Virgin sim and it wouldn't connect either
Guessing something wrong with the global rom now?
As with Note 3, MIUI 8 and the missing modem drivers?
Sparked an email back to Geekbuying to see what they can do
Thanks all
o1nk said:
Update ...
Guessing something wrong with the global rom now?
As with Note 3, MIUI 8 and the missing modem drivers?
Click to expand...
Click to collapse
Possibly - but there is also a possibility that it is a hardware problem. That will only become clear after successfully flashing a complete ROM (global or otherwise). Whether the ROM is global or China should not have any effect on connecting to a phone network (especially EE).
Which version of MIUI are you on? Try updating of there is an update available and see if that helps.

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