Originally Posted by Tejus Mehta
Dear Friends i have Samsung Galaxy S2 GT-I9100 phone bought in india in 2012 december. The phone was working fine with operating system which came with phone. suddenly today i felt to change the operating system to latest android OS jellybean. let me tell you one thing i am not a guru in this type of things so i tried whatever i could see on internet and installed Android version 4.3.1, Slim version Slim-4.3.build.2-OFFICIAL-1334.
Now my problem is the phone is working only for making phone calls and receiving phone calls. i cant even do SMS from this phone & its completely different then how it was. moreover i am not able to install whatsapp on this phone. and i am not able to see any google apps on the phone. neither my contact list is visible i had more then 700 contacts . and when i go on internet via WIFI and try to download whatsapp it says there is NO DEVICE. i am now confused and i dont know what to do. please can any one help me with simple steps how can I get my old version back or atleast how can i get google play store on this phone. Another important thing i tried to connect through Kies but even thats failure my device does not get connected to Samsung Kies anymore. i am worried i hope i havnt lost all my contacts.:
You have to install the Google Apps as a separate install when dealing with most non stock roms. Surely the guide you were looking at mentioned that...? Weird that you are having issues with Sms as it's rare roms have that trouble. Which messaging app are you using? Your contacts aren't there because you wiped your phone, installed a new operating system, and didn't install the Google apps to resync your account. I'm confused on why you're surprised by that... Kies doesn't work on non stock roms and is a much inferior tool vs Odin. Also, didn't you do a nandroid backup before installing Slim? If so, you could just restore that and you would be back to the previous version in like 10 minutes. If you didn't...well, you weren't looking at the right guides then. I think Slim is 10x better than stock, personally but depending on the phone and version, there can be some minor issues.
I think that Whatsapp doesn't recognize your phone because of the custom DPI. If you set that to stock value, it should work.