Hi, My wifes calls keep cutting out when she is using it, either incoming or outgoing calls. She was on a really old PAYG sim and we've continuously kept improving her contract. But what ever phone she uses her calls cut off after about 2mins of calls. this doesn't happen if I put my vodafone sim in her phone, so suspect the sim / signal having issues.
I see on this forum that other users have had issues over the months - and just reading that 1 user had a really old SIM (white one) and needed a new one to be compatible with newer technologies. Perhaps this is the issue. I am sure my wife has got this old white sim.