Question about Apple iPhone4 4G iPhone 4
Do Backup to iTunes on your computer before doing anything!
Quit every App program that is still in memory.. Double click the round button then drag every running App upward (in IOS8)
Do a Full Reset... Hold Down the Top Button & the Round Button for 10 seconds or so till you get the Restart slider.
Does Problem still exist
You will have to break the problem down. SIM or Carrier or iPhone?
Remove SIM card & Re Insert or try in another phone.
Do a Major Reset / Clean Reinstall from iTunes...
Hold Down the Top Button & the Round Button for 20/30 seconds or so till you get the plug into iTunes cable Icon.
Connect to computer running iTunes and select your iPhone Name & Click Restore Button in iTunes
Posted on Apr 02, 2015
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Posted on Jan 02, 2017
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