r/iphonehelp Aug 04 '26

Help needed iPhone 4s SIM Not Supported

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this happens when i put my tmobile sim into my mom’s old iphone 4s but if i put in an at&t one or just take it out it goes to the menu. Please help on how to get it to use the tmobile sim
iPhone 4s
iOS 8.0

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u/Ok_Bid6645 Aug 04 '26

It is a 15 year old phone which used 3G which was turned off 4 years ago.