Data

I'm not sure what you mean by appear but not work?  If you mean you're having trouble using data, try power cycling your phone.

I did that like 3 times. My phone says it has LTE, but when I use anything that needs Wi-Fi or cellular. It only works with Wi-Fi 

It works now. Apparently just took several hours

Hello @Nanners6,

We understand how important is to be connected and let's get the help you need.

Try resetting your network settings.

• If you're using iOS, tap Settings > General > Reset > Reset Network Settings.
• On Android, go to Settings > System > Advanced > Reset options > Reset network settings.
• Switch on and turn off the Airplane mode. 
• Make sure your device software is up to date.

Hope this helps! Feel free to revert for any further questions. 

Thanks for visiting AT&T Community Forums,
Gary, Community Forums Specialist.