roll back update 2.3.6 to 2.3.5

[blnswamy]

Hi everyone

i have recently updated my galaxy s2 skyrocket from its stock 2.3.5 to 2.3.6 rolled out by the service provider. i would like to roll back the update to its stock version. the thing is there are many bugs in this new version. my battery drains out twice as fast as it was earlier. i cannot connect to any wifi networks. please somebody help me roll back the update.. :''(