Roy RainfordAfter replacing the battery on my old iPhone 4s it's working! That is, on the internet via my local network for Mail and Safari but I can't send phone calls from it. There is a strong wireless signal. Have checked the settings against my iPhone SE, which makes calls and one difference is that the 4s has no 'Client ID' showing. Is this a password from my Provider, TalkTalk, or Carrier, Virgin?