I have a HTC one m7 a cousin gave it to me and I want to use it in Mexico but I can't access 3g or 4g network what can I do for make it work here
It needs to be activated on you line and have a service package that allows use in Mexico.
Yes but I want to use it with other companies so what can I do?
Check with the carrier you are using in Mexico if using a local SIM. It's up to them, not Verizon.