Phone cuts off at 30mins Xperia 10

[TC-MCSP]

Hi,

I have a Sony Xperia 10, and for the last 2months at 30mins during a call i make, the phone cuts off. I have tried using in safe mode, but same thing happens. I do use a different phone app other than the factory one on the phone itself. I use Drupe, but they say they have never come across this problem so it must be my phone itself. Can anyone help??

Many Thanks in advance 

Tracy

[Lord_viridis]

Are you sure your network hasn't introduced a per call limit as part of any fair usage policy?

[Gilgameshuk]

I agree with the gentleman above.

Have you tried with another simcard?