Thanks for reply.
I havnt tried for upgrade. Its a brand new handset and kitkat update is not stable.
Unreachable is not very frequent. My frnd upgraded to kitkat and not suggesting me at this.moment.
Already contacted network provider idea cellular but no success.They asked me to swap sim but 3G slot is for vodafone so unable to do so.
Any other suggestiob if u have pls ?
Sent from my Lenovo P780