iPhone 12 Pro Max issues

Hey there jitenderk,

Thanks for reaching out to Apple Support Communities. We understand that you're having multiple issues with your iPhone 12 Pro Max. We're happy to provide some assistance.

If your App Store apps are not downloading, check out this article:

If you can’t download or update apps on your iPhone or iPad

If apps are not working as expected ,this article can help:

If an app on your iPhone or iPad stops responding, closes unexpectedly, or won’t open

With regards to your cellular networking not working, we recommend following the steps here:

If you see No Service or Searching on your iPhone or iPad

We hope this helps.

Have a great day!

Thank you for the reply jitenderk!

You have taken some great troubleshooting steps already. Do you have a recent backup of your device in iTunes or iCloud? If not, please backup your device to prevent data loss. You can do that by performing these steps outlined here: 

How to back up your iPhone, iPad, and iPod touch

Once complete, we recommend that you restore your device as new (not from a backup) using iTunes. This will remove everything on your device and restore it to factory settings. See if the issue persists when the device is set to new. This will also download a fresh copy of the iOS. By doing this, it will help us determine if this is a software related issue or an issue relating to something on the backup. You can do this by performing these steps outlined here:

Restore your iPhone, iPad, or iPod to factory settings

If the issue does not persist when you restore it to new, then restore it from the backup. If the issue does persist while the device is restored to new, please contact us here to further investigate:

Get Support

Cheers!