i updated my phone to IOS 26 and i can’t use my moblie data anymore and make calls on my iPhone 11 Pro Max

There is clearly an issue with your cellular account, which means you need to contact your carrier for help.

Thank you for replying with your concerns, cabberros. 😉

Here at the Apple Support Community, we are volunteers (thoughtful Apple users) who share knowledge in an effort to help others, such as yourself.

I recommend that you contact Apple Support directly. Depending on your region, you may be able to reach them here: contact Apple Support.

All the best! 👋🏼😉