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I also have a Galaxy S2 from O2 in the UK (GT-I9100P) and want to upgrade the firmware due to the wifi freeze bug in ICS. As O2 have not released 4.0.4 I assume I now need to void my warranty and download and install the firmware some other way. That being the case am I best advised to follow Cooper1973 and install JB?

I've no idea what I'm doing so have been looking through this forum for some clues but so far I've not found a step by step guide other than the CNET video telling you how to install ICS. If someone can point me to the right guide that would be really great.

Also - do I have to ask O2 to unlock my phone first? And after installing will all my apps and data (emails etc) be intact?
 
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I also have a Galaxy S2 from O2 in the UK (GT-I9100P) and want to upgrade the firmware due to the wifi freeze bug in ICS. As O2 have not released 4.0.4 I assume I now need to void my warranty and download and install the firmware some other way. That being the case am I best advised to follow Cooper1973 and install JB?

I've no idea what I'm doing so have been looking through this forum for some clues but so far I've not found a step by step guide other than the CNET video telling you how to install ICS. If someone can point me to the right guide that would be really great.

Also - do I have to ask O2 to unlock my phone first? And after installing will all my apps and data (emails etc) be intact?

Hi I changed too jb but prob now I want too use nfc so now I will prob have too go back too ics. If your with 02 on contract they dont charge for unlock just fill there form out online. I have tried patch for nfc but didnt work.
 
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I also have a Galaxy S2 from O2 in the UK (GT-I9100P) and want to upgrade the firmware due to the wifi freeze bug in ICS. As O2 have not released 4.0.4 I assume I now need to void my warranty and download and install the firmware some other way. That being the case am I best advised to follow Cooper1973 and install JB?

I've no idea what I'm doing so have been looking through this forum for some clues but so far I've not found a step by step guide other than the CNET video telling you how to install ICS. If someone can point me to the right guide that would be really great.

Also - do I have to ask O2 to unlock my phone first? And after installing will all my apps and data (emails etc) be intact?


Hello

Follow this guide
http://androidforums.com/samsung-galaxy-s2-international/680070-jelly-bean-update-dummies-guide.html

The latest LSD release will be fine for your phone but as pointed out by Ironass you will lose NFC.

The release is a non wipe release so your apps etc will be fine but be aware that some apps may not be compatible with this release.

You do not need your phone unlocking but you will lose the O2 branding and O2 specific apps that your carrier has included in the ICS firmware

You should pay attention to this section in the guide

#1.7. My CSC code is not eligible for JB yet but I want it now!

The process is pretty simple but if you require any help then just ask
 
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