Can’t Make Calls
If you want to make a call, your iPhone has to be active and there has to be a cellular network in range. Your carrier’s name should be displayed in the upper-left corner, along with your current signal strength. If you’re roaming on another provider’s network, you should see that network’s name. If you don’t see a network name or you see No Service, then you will not be able to make calls until you are back in the range of a wireless carrier. Also, if you have traveled outside of your country’s home network, you may not be set up for international roaming. Check with your carrier to make sure that your account has international ...
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