I just got a new phone and installed the old skinny nanosim. Unfortunately, the phone cannot connect to the mobile network from my home; the connection is sporadic, in some rooms I get to see one or two bars for a few minutes then they are lost. I live in Sheffield, Canterbury. When I am in Christchurch, the phone works without any problem, and in some places in Darfield the phone can receive signals. I checked with the skinny site plugging the IMEI number of the phone and it said that the phone is not supported but this does not make sense to me. If the phone is not supported why does it catch network in Christchurch but not in Sheffield? Would greatly advice if you can advice how to fix this (without changing the phone)

Kind regards,
Arin Basu