By no network coverage do you mean no cellular signal or can't connect to your home wifi? If wifi trouble push settings button on iphone. Select and turn on wifi. It will search for available wireless networks. Choose your home wifi, should be the strongest signal, most bars. If you don't know your ssid , look on the sticker on the modem. For instance ssid at&t 2345. Once you select your ssid you need to enter password which is also found on the sticker on modem. Enter password and select join. You should now be connected to your wifi. This will always reconnect automatically when you leave and come back home. If not wifi issue, are you just too far from cell tower to get good signal?
SOURCE: HOW DO I UNLOCK THE IPHONE 4/4S TO ALL NETWORKS
Hi, it's possible with the following service that provides an official carrier authorized unlocking for iPhones: http://www.fastgsm.com/en/apple/apple/iphone-4s/unlock/country-network
SOURCE: how to unlock my iphone 4s locked at T network
You can use this service: http://www.guaranteedunlock.com/iPhone_Unlocking
They are very reliable.
SOURCE: iPhone 4S Issues/Will Not Turn On
Hello, First check to see that your power cord is working to charge your unit. Then remove the battery and let set for 2 mins and then put back into unit. If this doesn't fix then you will have too call cust service or tech support for iphone and work with them. May have too send in too have repaired.
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