I have a standard S3 I-9305 LTE in South Africa. Not rooted before or any mods. But somehow it started bootlooping a couple of weeks ago. I read and implemented the Recovery Mode- Cleared the cache and then rebooted, and it worked, plenty of times.
But now it has gone into a solid bootloop and i cannot access recovery mode. So read up about Download mode and installed Odin, Kies and the Cf Root file on my PC.
Now when I enter Download mode on the phone, and continue( press Volume Up) after the warning, the device restarts again. This I have done a hundred times and each time removing battery and waiting a couple of minutes. So essentially I cannot get Download mode to function but I do have access to it.
So this I know, this is a software , possible ROM problem, NOT hardware as the device worked perfectly after bootloop issue started.
I did the latest Firmware Upgrade to Android 4.2( i think, i r noob in this) yesterday. This was done on the phone itself under About-check-firmware. The Phone worked fine afterwards but then went into this never ending tormenting bootloop without yielding.
I live far from a proper service centre and I need my phone for work, thus very urgent.
I also have checked if the power button is stuck but it is not.
I am prepared to root the device and install any other ROM, Flash anything that can get me back on.
Any advice please?
Thanks in advance