Question [Q] incredible....sms trouble on g2 d802

Hi guys
I'm looking for something like this but nobody have mine
I'm from Italy on h3g mobile operator
Buyed g2 EUR SWS online,version 10a
Everything seems fine except:
Some browser freeze
Not sending sms on default app,just receive
I have checked for sms center service number but it's ok...
I need an help cause Italian forum haven't any ideas about this issue
I'm just hoping a sim issue and not an hardware problem
Could help please?
Many thanks
P.s. mine d802 32gb everything stock,no modding need

I've changed sim card and sms trouble ddisappeared

I'm still on a stock browser issue, could help please?