"mobile network not available".with nexus 4"

[AmmuD]

Hello

I have frequent problems with the fido mobile network on my nexus 4 ( with display on phone as  no mobile network). This happens every where in toronto: in Downtown and North York. What' happening with the fido network - how to fix this issue? 

Thank you

***Edited to add labels***

[FidoStephane · Accepted solution]

I suggest a hardware isolation test; Insert your SIM in another phone, and see if the issue persists. If it does; it's the SIM. If it doesn't; It's the phone.