Unlocking bootloader - Xperia Z4 Tablet Q&A, Help & Troubleshooting

Just a technical question..
Why are bootloaders locked when devices are shipped out by the manufacturers, and after getting it unlocked to update to a new ROM (I want to flash my Z4 Tablet to lineageos) should it stay unlocked or does it need/should be locked again?
Thanks for the clarification is anyone knows

Related

[Q] What about simlock?

Hi friends,
Before buying this cute smartphone, I want to know if we have solutions to unsimlock the Xperia S.
Thank you all
if you have option, buy unlocked one
why?
1) phone is locked so no other network
2)unlocking phone would be very expensive since is new so £30-40 + wait to people work out how to (price in highstreet)
3)instatly lose warranty - (test point)
4) locked bootloader no fun on xda
-no fastboot
-no unlocked botlooader
-no xrecovery
-no custom rom
-no root
- long wait for update.
- i am not sure whether unlock simlock = unlocked bootloader.
hilaldroid said:
Hi friends,
Before buying this cute smartphone, I want to know if we have solutions to unsimlock the Xperia S.
Thank you all
Click to expand...
Click to collapse
Currently there is no free Sim Unlock in the DEV section. Best check next time before asking
The phone has been out around 3 weeks, might be a while before a solution can be found.
I have checked more than you can imagine that's why I have asked to know if there is a solution because I didn't find it
Docomo unlocked at purchase for $39 USD
Sent from my SO-02D using xda premium
I won my Xperia S in a competition from Three UK.
I'm on Orange and have my contract to pay so I asked Three for an unlock code. They've had to speak to Sony because even Three don't have a code yet.
I paid £15 on 9th March and I'm still waiting for an unlock, just want to use my beautiful Xperia
marcoplo said:
if you have option, buy unlocked one
why?
1) phone is locked so no other network
2)unlocking phone would be very expensive since is new so £30-40 + wait to people work out how to (price in highstreet)
3)instatly lose warranty - (test point)
4) locked bootloader no fun on xda
-no fastboot
-no unlocked botlooader
-no xrecovery
-no custom rom
-no root
- long wait for update.
- i am not sure whether unlock simlock = unlocked bootloader.
Click to expand...
Click to collapse
Are you sure?
A network locked phone cannot be root and no unlocked bootloader?
my X10 was locked and I could root it easily and flash other official roms (different baseband).
Then I sim-unlocked it before flashing custom roms, so I don't know if I am able to do that with a locked phone though.
moonset said:
Are you sure?
A network locked phone cannot be root and no unlocked bootloader?
my X10 was locked and I could root it easily and flash other official roms (different baseband).
Then I sim-unlocked it before flashing custom roms, so I don't know if I am able to do that with a locked phone though.
Click to expand...
Click to collapse
Just got my Xperia unlocked officially from Three UK. So it works on any network however all the Three integration is still there and after checking the bootloader status I am unable to unlock the bootloader as of now.
So although it's unlocked to any network, it's still kinda locked with regards to the bootloader and rooting.
MattNoblett said:
Just got my Xperia unlocked officially from Three UK. So it works on any network however all the Three integration is still there and after checking the bootloader status I am unable to unlock the bootloader as of now.
So although it's unlocked to any network, it's still kinda locked with regards to the bootloader and rooting.
Click to expand...
Click to collapse
Have you flashed an un-brand firmware? (there is a way to flash another official rom without rooting/unlocking) Maybe it would be bootloader unlock-able after that...? (i really not sure about this)
But there should be a way to root the phone without bootloader unlocked soon or later anyway (just like the others)
and i know that the X10 can be bootloader unlock even with simlock (although the method came out quite late...)
it's just a matter of time, shouldn't be the end of the world
moonset said:
Have you flashed an un-brand firmware? (there is a way to flash another official rom without rooting/unlocking) Maybe it would be bootloader unlock-able after that...? (i really not sure about this)
But there should be a way to root the phone without bootloader unlocked soon or later anyway (just like the others)
and i know that the X10 can be bootloader unlock even with simlock (although the method came out quite late...)
it's just a matter of time, shouldn't be the end of the world
Click to expand...
Click to collapse
I've not flashed any new firmware as of yet because I'm not confident in what I'm doing haha. I'm not rushing to find anything, but would like to root at some stage. And if I can unlock the bootloader I would
IMEI UNLOCK Sony Xperia S
Hi,
I planing to buy a Sony Xperia S and IMEI unlock it...Maybe this is a stupid question but if I buy the Xperia S new, is it possible it comes already with blocked counter? or every Xperia S comes with 5 to 10 attempts? and if it comes with factory blocked counter, is it still possible to remove simlock? Would it be to expensive? I really need to know this in order to know if I buy the Xperia S or not. Sorry if it is a dumb question but I was an iOS user 'til now. Sorry if I post this in the wrong thread.
Thank you!!

[Q] Prerooted image without unlocked bootloader?

Is it posible to flash a prerooted official image with digital signature (if that exists) without having the bootloader unlocked?
my problem is that i can't unlock my bootloader because of my phone company, but i recently flashed the new ICS to my phone and it worked perfectly. this wasnt a problem apparently because it was signed by sony or something and the bootloader didn't complain. so, does there exist a rooted but official image i can flash without unlocking the bootloader?
Thank you all in advance. im really frustrated by not being able to root my device :crying:
hope somebody can help.
SuperJugy
No.
if rooting is all you want with a locked bootloader : see this :
http://forum.xda-developers.com/showthread.php?t=1737929
Wow, if this works im going to love you so much!
Edit: It Worked! i have my Xperia S rooted even with locked bootloader! Thankyou very much =)

Question about the Z2 tablet from Bell

I just wanted to get some info. I currently have this tablet from Bell. I know the bootloader is locked and I can't unlock it, so does that mean even with dualrecovery, I can't use any custom roms at all?

Can I install CyanogenMod?

Just recently purchased the Xperia Z2 Tablet and I'm very disappointed to find that I can't unlock my bootloader. I read a post on here that mentioned it was still possible to install CM on a locked bootloader. Could anyone explain to me how I could do this or link me to a thread that will help? Here's my device info:
Model SPG561
Android v4.4.4
Build 23.0.1E.0.208
Currently unrooted.
I actually got this today after returning a tablet just because I couldn't install CM or unlock the bootloader. I'm very close to just returning this and getting a different one. If I'm **** out of luck with the Z2, could anyone recommend a Verizon LTE tablet, with good specs, that will allow me to unlock the bootloader? I'm getting desperate.
Thanks for any help.
dz93 said:
Just recently purchased the Xperia Z2 Tablet and I'm very disappointed to find that I can't unlock my bootloader. I read a post on here that mentioned it was still possible to install CM on a locked bootloader. Could anyone explain to me how I could do this or link me to a thread that will help? Here's my device info:
Model SPG561
Android v4.4.4
Build 23.0.1E.0.208
Currently unrooted.
I actually got this today after returning a tablet just because I couldn't install CM or unlock the bootloader. I'm very close to just returning this and getting a different one. If I'm **** out of luck with the Z2, could anyone recommend a Verizon LTE tablet, with good specs, that will allow me to unlock the bootloader? I'm getting desperate.
Thanks for any help.
Click to expand...
Click to collapse
I can't see how you could flash CM on a locked boot loader as it requires a custom kernel.
I don't know anything about the Samsung tablets on vzw but I suspect they are locked down. The LG tablet can be "unlocked" with bump but its a piece of garbage. If the Nexus 9 is available for vzw its probably your only chance at getting an unlocked boot loader. Some of kindle fire tablets can be unlocked as well but they need to be on older firmware AFAIK
Unlocl boot loader
Yes you can unlock bootloader by going the sony site and follow the instructions. I ask you for the emei number ad other things. but follow the instructions carefully.
2nd option. Use Sony mobile flasher by androxyde it works perfectly well on mine. But if youneed to update or upgrade through Sony Compagnon, you will need to relock bootloader, install update and the (re) unlock bootloader. It works for me...

Is there any way to unlock the bootloader for the Verizon version of the Z2 Tablet

As the title states, was there ever a way to unlock the bootloader on the 561 variant of the Z2 Tablet? I managed to find one in really good condition on Craigslist for cheap, but now looking on XDA most of the work is for the Unlocked version or European Version. I can root the tablet but in order to get the nice juicy roms the dear devs have worked on I need to have the bootloader unlocked.

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