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Xinyuan-LilyGO / T-SIM7600X

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Sim7600G-H Voice Call feature is not working.. #104

Open TexeCode07 opened 1 month ago

TexeCode07 commented 1 month ago

I have a LilyGO SIMCom 7600G-H module, which I tested with a Verizon or T-Mobile SpeedTalk SIM. I found that the voice call command was not working, with "NO CARRIER" as the reply from the modem. However, it was working fine two weeks ago. To check, I went to T-Mobile's IMEI checker and found that this device is no longer supported. Despite this, internet and SMS are working fine, so I think the issue might be related to the B71 band not supporting calls with this modem.

Could you suggest some good SIMCom LilyGO modules that support the maximum number of SIM modules in the USA? Thank you. Reference Sites: USA frequency support by sim https://www.frequencycheck.com/carriers?utf8=%E2%9C%93&q%5Bname_cont%5D=&q%5Bcountry_id_eq%5D=240&q%5Bfrequency_bands_id_eq%5D=&commit=Search IMEI Check https://www.t-mobile.com/resources/bring-your-own-phone https://www.verizon.com/sales/prepaid/byod/enterDeviceIMEI.html

lewisxhe commented 1 month ago

This has nothing to do with IMEI. Did you buy the SIM7600 version with audio decoding and solder the speaker and microphone to the motherboard? If any of these steps are missing, you will not be able to make a call.

TexeCode07 commented 1 month ago

No normal Lilygo Sim7600G-H Device.. i Just placing call as an Alert. This simcom behaves Very odd now have 2 sim with same data plan. One sim work with Call and sms good other one work sms and internet and no call. Dont know why 2 different cases will try to get more info on this..

lewisxhe commented 1 month ago

Please confirm whether both boards have NUA8810 audio decoder chip.

If both have this chip, please provide all AT interaction logs