O2

Hi,How do I set my phone to give the engaged tone when someone rings and I'm already on a call? Currently it will just ring out and people think I am ignoring them. I don't want voicemail. I have set 1710 but this only gives a msg for missed call if ...

Hello,I'm trying to establish if I can transfer data from one plan to another? I have two contracts both with 100Gb data (both for mobile WiFi boxes), my son is rapidly using his with his xbox, mine is hardly being used as all my current weekend even...