My Xperia P is experiencing WIFI issues. I read the previous 5 pages but only 1 person seems to be having a similar problem (WIFI hangs after 2 hours of usage and a reboot is needed to get it working again).

I am on firmware 611B154 and I am prompted to upgrade to 611B175 but I am also reading reports overseas that 611B175 is causing lags.

Can anyone help?