Sim Card

The SIM cards are the same size: both are Nano-SIM.

Remove or switch the SIM card in your iPhone - Apple Support

Learn which size SIM card your iPhone or iPad uses - Apple Support

Another possibility for problems is that the target iPhone is carrier-locked, and you’re trying to change carriers.

How to unlock your iPhone for use with a different carrier - Apple Support

Failing that, yes, contact your carrier.

The iPhone 6S and the iPhone XS Max uses the same size SIM card. Both of these iPhone models use the Nano size SIM cards. If you are having trouble fitting the SIM card in the iPhoen XS Max, then visit the Verizon store and they will make the SIM card swap with ease.

NOTE: There is a notch cut out from one of the corners of the SIM card. Ensure that the notch on the SIM card lines up with the notch in the SIM Card Tray. Ensure that the SIM Card tray is inserted in the iPhone correctly and is not forced in.

Axel F.

sarassie wrote:

My mom's sim card is kind of old. She had the 6S for more than 3 years. So, I gave her my 10S Max. She won't buy a new phone. She has Verizon Wireless.

iPhone 6s uses nano-SIM, as does iPhone XS Max.

If the three blue-text links to more information that were included in my previous post don’t resolve this, check with Verizon.