Not getting registered on 2g network only 3g getting selected

[Priyattam]

In my xpera C3, 2G network is not getting selected in either slot with any SIM. It shows message "Network Selection Unavailable ". Problem is not getting resolved even i flashed my phone with android 4.1.1 to 5.1.0. Please help to get rid of this problem.

[vishnuunhisv]

i have same problem ,what can i do plz help soon