[Q] Flashing GS2 back to 2.3.6 from 4.0.4
Hello guys. My device used hyperdroid 7 androidmeda before then I decided to flashed to Cyanogenmod 10.2 yesterday but some problem popped up. My GS2 can't find any signal, IMEI disappeared from "About phone". I tried many ways to solve it but all had failed so I flashed again with 4.0.4 base rom (I9100DXLPF - Thailand) successfully and got my IMEI appeared again with full phone signal. Now I'm planning to flash it to ERobot version 24(android 4.0.4) since it's quite popular in my country and that leads to my question
1. Since I flashed 4.0.4 base rom does that mean my device got unrooted?
2. If it's unrooted then should I flash Siyah kernel 5.0.1 through Odin to get it root again?
3. Does Siyah kernel already has CWM? or do I have to flash CWM in later?
4. In the case that ERobot rom can't function like I expect it to and I might want to go back to hyperdroid 7 which has android version 2.3.6 can I just use "install zip from SDCard in CWM" because at the time I should have CWM in already and with Siyah kernel.
My current device
Model number : GT-I9100
Android Version : 4.0.4
Baseband Version : I9100DXLPB
Kernel Version : 3.0.15-1056084dpi@HP16 #3 SMP PREEMPT Thu Aug 23 13:50:48 KST 2012
Build number : IMM76D.DXLPF
also I got my IMEI back just from flashing this base rom
Thank you in advance