[Q] No 3G access on vodafone in India on my unlocked US AT&T SGS2 - Android Q&A, Help & Troubleshooting

Hello,
I am currently using Samsung Galaxy S2 SGH-I777. This is been unlocked with the code provided by AT&T. After unlock I am able to use the phone with my Vodafone IN sim with the 3G connection. Recently around 3 weeks back, I have upgraded the mobile from 4.0.3 to 4.1.2 via kies. Currently it is in I777UCMD8 band and Kernel version as 3.0.31-1154545-user [email protected] #3.
Since firmware upgrade, I am unable to use the phone with 3G.
The mobile network connection is not consistent, and unable to make or receive any calls.
I did some search in the forums and came across the code *#2263#. using this I selected the band as GSM only and i am able to have continuously, and able to receive and make the calls.
I tried out inserting another vodafone 3g sim and able to use the 3g and continuous signal on my mobile, where it is not working with my sim.
I tried out my sim in another 3g phone and was able to have access the 3g and continuous signal.
I have replaced my sim couple of times, and even that didn't worked for me.
Any help on this is much appreciated.
Thanks,
Krishna.

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[Q] Vodafone SGS2 with TPG/Optus Sim

Hi all,
I have an unlocked AU vodafone SGS2 and am using my TPG $1 plan simcard.
I have found when using TPG sim I can only obtain download speeds of 10KB/s however on Voda sim I can get in excess of 300KB/s. I get 3G signal on TPG sim, I can still make and receive calls - just data is the issue.
AFAIK, I am using correct respective APN settings. My question is - is there some sort of hardware difference in the SGS2 which is making my TPG/Optus sim data extremely slow/limited?
Cheers all.

Network realted question. Please help!

Howzit guys,
I brought a HTC Aria in the USA on AT&T network. I came back to SA and rooted my phone put Android v2.2 on (phone came with v2.1) thinking that would unlock the phone, but it didn't. I ended up looking on the net for a website that I could get an unlock code for my phone. Long story short, I found one, paid for it and it worked. I'm using the phone on Vodacom no matter what I do I can't get 3G or HSDPA to work, only GPRS. HSDPA and 3G work fine in the states.
After doing some research I noticed that in the Mobile Network settings on the phone there is 3 options under Network Mode:
1. WCDMA only
2. GSM only
3.GSM / WCDMA auto
Now from what I've seen I need to use WCDMA to get the 3G / HSDPA to work, but when I select option 1. I don't get any signal and then phone eventually switches to GSM automatically. I was at work on the weekend helping a customer with her laptop and she had a 8•ta 3G modem, and 8•ta 3G modems are currently running off of MTN's network I was told this by an 8•ta technician and I noticed when connecting the modem it said something regarding WCDMA.
So now my question, if I change to MTN do you think I will be able to use 3G / HSDPA on my phone?
Any info regarding this will be greatly appreciated.
Thanks
The American version of the Aria uses different 3G frequencies (because that's what AT&T uses), so unfortunately your phone will not work with 3G in South Africa. There is a different version of the Aria (called Gratia in most regions) that is the exact same phone except it supports the correct 3G frequencies for your country, but there's nothing you can do with the phone you have now to make it work.

[Q] SGS2 doesn't get any signal with WIND Canada

Hello
I have a problem with my phone.
Model number: GT-I9100
Androiud version: 4.0.4
Baseband version:I9100XXKG6
Cyanogenmod version: 9-20120523
I've bought a WIND sim card and it works fine with a nokia phone, but somehow it doesn't work with my SGS2 at all.
I mostly don't get any signal with it , just once in a while a full signal but I just can choose Roger and Mobilicity as network. There is no WIND network and I can't do any phone calls or something.
I don't know what to do because it just works fine with the Nokia phone.
I changed the Custom Rom to WIUI and stock rom but no change.
Probably because that phone doesn't have aws frequencies it only works on bell rogers telus virgin
Sent from my GT-I9100 using Tapatalk 2
when I used WIUI it shows not Rogers and Mobilicity anymore but only WIND HOME and WIND AWAY, but I can't be registered on both.
It will be impossible to connect to Wind Home. Wind uses the 1700 UMTS frequency (same as T-Mobile USA) and the i9100 supports UMTS 850/1900/2100. The only SGS2 that supports the AWS frequency is Telus' SGS2X.
You now have three options if you want to use your phone:
1) Buy a new phone that's AWS compatible
2) Connect to Wind Away and enjoy roaming charges for everything
3) Switch to another Carrier that's not based on AWS
I'm sure I've got a sms from WIND after togging up saying I'm good to go.
And even when I use the Roger Network, I can't do any calls or anything.
Why is that so?
The answer above hasn't changed. Just because you can see the networks doesn't mean your phone supports the frequency required to make calls. Sim card doesn't matter either because its the network that's the problem.

[Q] s2 no network emergency calls only

I have a s2 unlocked I put o2 uk sim and I get no network same with voda tmobile and orange so my thinking is the phone as been blocked but thdn I put a 3 network sim in and the phone works fine makes and receives call I have debranded phone and updated via kies but still ssme so now im scratching my head

Immediate dropped network overseas Alcatel OT Fierce

I have an Alcatel One Touch Fierce, originally T-Mobile, currently unlocked, stock ROM (4.2.2) rooted. It had no connection issues in the US or in Germany, but anywhere in Israel after boot it connects to the mobile network for only a fraction of a second, just long enough to receive a bunch of brand new notifications, and then it immediately drops the network and can't find it again. It does this both on an american T-Mobile sim while roaming, and with a local Israeli sim.
If anyone has a generic fix that worked on any handset that I could try, or anything, I'm kinda desperate here.

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