Today is Saturday, November 4th at 11:35p 2023. I JUST FINISHED activating and placing a phone call on an iPhone 4 and an iPhone 4S unlocked using the T-Mobile network, just turn OFF 3G and it works like a champ, even getting 5MB up / down over the 2G network. All I did prior was to reload and reset to factory defaults using latest available iOS via iTunes on Windows 11. I was even able to get the original iPhone 2g to work on T-Mobile after requesting a carrier unlock from AT&T which they processed in less than 30 minutes using their online unlock tool. One caveat on the original iphone the web browser and such doesn't work due to SSL related issues just too **** old. Would be nice if Apple would push out an update to latest iOS version for the original iPhone updating the certificates just for those that still like their old tech to work.