i have problem with my i phone4s.they are not calling to another cellphone
i have a problem with my i phone4s,we have a signal, but i cannot calling to another cellphone.
iPhone 4S, iOS 9.0.2
Hi! Try to reset your device. This won't delete your data stored on this device.
- Press and hold the Sleep/Wake button
- Press and hold on the Home button
- Keep holding both buttons until the display turns off and back on with Apple logo on it.
Alternatively, you may go to Settings - General - Reset - Reset All Settings
https://support.apple.com/en-us/HT201559
If this does not help, restore your device to factory settings. Note that this will erase the data from your device.
Take a look this Apple Support article: Use iTunes to restore your iPhone, iPad, or iPod to factory settings - Apple Support.
If these steps don't work, contact Apple and ask for help.