samsung galaxy s2 SHW-M250K topic

Hello bro...

I have a phone . It's model is SHW-M250K and is currently running Android GingerBread 2.3.6 in galaxy s2 i9100.

I want to root and instal cwm in my phone (and if possible upgrade it ). my signal not work well.

I would really appreciate your help if you can refer me to a useful tutorial, as I have found none.

Thanks so much!