I've noticed that my phone rings a couple of times then silent going into voicemail. I've tried calling myself from the landline and another mobile and there is a delay in my ringing. I can hear the call going through but my mobile rings only after four-five rings. Has anyone had a similar experience and do you know if this is an operator issue or something to do with my phone? I own a One plus one and have never really had major issues.
PS: Also the delay seems to vary from ring tone to ring tone