My daughter and I use Sony Xperia M phones, recently supplied by O2, as part of a monthly contract, with exactly the same tariffs. Both of us have set our ringtones to 30 seconds, before call divert to voicemail. On my phone I have no problem. When she rings me on her phone, after 5 seconds she is diverted to my voice mail. This problem does not occur when she telephones any other phones, either with O2 or any other service provider. O2 does not appear to have a solution to this. Can anyone please help?
