Unable to Connect to AT&T Network

I have an Asus Zenfone 5 ZE62OKL, the 2018 version and AT&T in USA. I'm able to make phone calls and text messages but unable to connect to the internet on 4G, 3G, or 2G. It is on Oreo 8.0.0. I am using the suggested APN settings for my sim card from AT&T and still unable to connect.

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