How did my neighbor hear my cell phone conversation from over 100 miles away on his cordless phone?

SOURCE: iphone can't receive calls

check in settings/phone to see if you have maybe turned on call forwarding and it is being forwarded automatic to your voicemail box number

SOURCE: During a phone conversation, I hear 3 beeps and my

May be losing the call, are you in a basement or office building when you loose these calls?

SOURCE: call failed

probably out of minutes with att or you dont have service.

SOURCE: iPhone has been locked up

Hi..have you tried your SIM in a different phone and does it work?? If not then its most likely the network with the issue not the phone but if the SIM does work in another phone all i can suggest really is to try restore your phone from a back up from before you started having trouble with it...so say you have a back up from 3 days before you had the issue then restore from that...restoring from a back up will prevent you loosing all your iphone data.. if that doesnt work im afraid you'll have to restore your phone as new to wipe it and basically start fresh..

Hope it helps!!

Use the following steps to restore your device: before doing this please make sure you have your comp powered up and an updated version of itunes on it.

1. Power down your phone and holding down your home button for around 6secs, connect to your comp still holding the button until you receive a message on itunes saying an iphone has been detected in recovery mode, then continue to restore your iPhone.
   
2. Select the Restore option.
3. When prompted to back up your settings before restoring, select the Back Up option (as seen in the image below). If you have just backed up the device, it is not necessary to create another.
   
4. Select the Restore option when iTunes prompts you (as long as you've backed up your device, you should not have to worry about restoring your phone).
   
5. Once the restore process has completed, the device restarts and displays the Apple logo while starting up:
   
   iPhone only: For the iPhone only, after a restore, the iPhone displays the "Connect to iTunes" screen. Keep your device connected until the "Connect to iTunes" screen goes away or you see "iPhone is activated." If iTunes does not have an Internet connection, you cannot complete this step.
   
6. The final step is to restore your device from a previous backup. Once your device is restored and-in the case of the iPhone-in the process of activating, you should be able to see the following in iTunes:
   
   Select the backup you want for your device and select the Continue button to complete your device's restoration.