GL X750 with (known working) Telekom SIM does not connect to Base Station

[alzhao]

Check this post and find the Troubleshoot part and images, which states the best settings.

North American Carriers, ATT, Verizon, Cricket, T-Mobile Setup and Update 2021

This post is an update of Using GL.iNet 4G devices with North American carriers, especially in the USA. If you have problems connect to your 4G network using GL.iNet 4G devices, please refer to Modem FAQ - GL.iNet Docs 3 first. T-Mobile T-Mobile should be the easiest to work with. Generally all GL.iNet 4G devices can work with T-Mobile SIM card without any problems. If you have problems, try to change the settings as in troubleshooting here Modem FAQ - GL.iNet Docs 3. If cannot solved, you’d …