Monthly plan - no network in Thailand, but in Germany

All of AT&T plans are monthly plans. That does not tell us much.  Prepaid plans Do not connect (select) another countries without paying for the $35 add-on.

Postpaid:

Receiving a text messages free, but connecting to a foreign network and using data is $2.05 per megabyte.  You don't have international day pass, or at least turn your data off, You could rack up thousands of dollars in international roaming charges. 

If you're in another country, you are using their network. Your phone has to have service bands which are compatible with that network.  You did not say what phone you are using but most bargain Android phones have bands for North America and South America, but lack the common bands used for service in other parts of the world.  

You can try power cycling your phone. But AT&T can't do anything to make your phone work in a foreign country. It's entirely between the phone that you purchased, and the local network which may or may not be as robust as networks in Germany or the United States.  My nephew went to Thailand two years ago and didn't have great phone service.  

Many thanks for the answer.

Since I can receive text messages in Germany, I probably have a postpaid plan. When I go into my AT&T account, I also see that I can receive unlimited text messages in 200+ countries. So that would be resolved.

My phone is an iPhone 14 Pro Max, so that shouldn't be the issue. I've already turned it off and on again. Without success. I have a second iPhone 14 Pro Max that works perfectly in Thailand with a German and Thai SIM.

The Thai networks are among the best in the world. Here I still have 4 bars of 5G on the flat land, standing in the middle of the rice field. With each of the three major providers.

I read somewhere that AT&T has entered into a cooperation with one of the Thai providers to provide business customer services. Which provider is this? Maybe it would help to connect manually?

Thank you again.

Can't anyone help? My phone simply won't connect to any network in Thailand when I have the AT&T SIM installed. Everything works with a German SIM and with a Thai SIM anyway. Isn't there also the option of receiving text messages via WiFi? How does this work?

Thanks, Ch.

Hello @Chulalongkorn, we hear you and undertsand the importance of uninterrupted network while roaming.

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