If you have activated the replacement SIM - It is usually activated within a few minutes(30), but it can take up to 24 hours in some situations. I also suggest you turn your device off and on again periodically to see if that helps. If your SIM is not activated after 24 hours, then i suggest you contact a giffgaff so they can verify the status of replacement SIM activation. A giffgaff agent can be contacted by following this https://support2.giffgaff.com/app/ask/SIM-and-number/Activating-my-replacement-SIM/form/ link , please note during busy times a giffgaff agent can take up to 24 hours to respond to your query.
Welcome to giff gaff the person your calling can’t take your call right now please leave message after the tone.... I’ve checked with him the phone the sim is in is an 02 phone. I’ve also topped it up today to see if that helps but it’s still not working.
He did order another sim card for his friend but has yet to give it to him.
@swinkle02 Could you pop the spare unactivated sim in the phone,
Does it show a signal and do you see the words "not active" on the phone screen when you dial *100# ?
If you do, you need to perform a sim swap Log into your son's account Http://giffgaff.com/dashboard Check you're in the correct account (important if you have several accounts or manage accounts for others)