Deutsche Telekom can't seem to learn... | iPhone 4S: Deutsche Telekom exchanges SIM cards | Mac & i News Forums. Interesting - the Deutsche Telekom problem with SIM cards in the iPhone 4S doesn't seem to be new at all. Okay, it's a link to the Heise forum and thus anything but hard fact, but somehow still strange. In Google, for example, in various Android forums I also found something from April this year, it really seems to be the case - and the hotline also just accepted the order for the exchange without any problems. I'm curious to see if the replacement card is also a 3N card (you can apparently see this directly on the cards). And just as curious to see if my iPhone's tantrums will stop then. However, it's a weak image that the Deutsche Telekom service notes still claim that exchanging the SIM card won't help and that there is no normal announcement - I only saw this by chance in the Heise ticker.