New phone last Christmas but the SIM is a couple of years old.
We have been having numerous problems with calls being unsuccessful since getting the new phone. Sometimes a call cannot be made and sometimes someone calling the phone gets ringing tone but the phone does nothing.
We are in a fairly rural area but have a strong 4G signal and very weak 3G signal. The previous phone was 2G/3G only and had no 4G option.
I have tried forcing the the handset to LTE/WCDMA, LTE only and WCDMA only so I am able to eliminate 2G fallback as being a possible cause. From my tests I would say 3G is less likely to have a call connection problem but the signal is too weak to be usable in many locations. 4G although it often has a strong signal is likely to fail with setting up a call. Sometimes however it does work perfectly.
Would it be possible to have a new SIM sent out as I feel that something in the 3G-4G handover process is getting screwed up and it may just need a newer version of SIM?