[iMore Question]

I think it might be that my modem is not working [I cant connect to any local networks to have my cell phone working , I can use Wifi and the phone as a tablet but cant use the phone to call, it does not recognize and keep showing me the icon of searching..]
Can I try and fix it by entering the DFU mode?
Or how can I try to have my Sim to work?
I changed Sims, restored my Iphone and still the same

[Just_Me_D]

Check with your wireless carrier. It's possible that your wireless service has been terminated or temporarily disconnected. The device could also be blacklisted.

[darkfungus]

I did that, wireless is working, just cant get the Iphoe to recognize the sim card host company so I don't have the phone calls and other perks that come with the carrier sim company such as the int'
Is their a way for me to fix this on my own?
I changed Sims already.

[IAmSixNine]

If your iPhone says searching after you insert a sim then it does indeed recognize the sim card. Otherwise it would say No Sim.
I would suggest taking a good known sim from another phone and testing it. If it stays on searching i would then reset network settings. If it still fails take it to an apple store.