MESSAGE which comes often: check sim card or contact customer care.
Wifi to mobile data does not switch, Signal goes off NO NETWORK.
Signal dropout very very often, device needs to be restarted to restore network.
Sim card disconnects often from network.
Sim card seems ok as tested on other device and works in 4g and 3g.
Setting phone back to factory default has NOT helped.
Changed to new nano sim from Elisa was ok for a day but again problem of network disconnection jamming continues.
Any thoughts or do I need to send the phone to the service center ?