Signal problem,mobile communication disappears

Please tell us some basic information before asking for help:
- Model Name: asus rog phone 3
- Firmware Version: strix edition
- Rooted or not:
- Frequency of Occurrence:
- APP Name & APP Version (If your issue relates to the app):
In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc.
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Hello, I have problems again, now with the mobile signal, before it was only when 2 seven cards were inserted, communication was constantly lost, now communication with one seven is also lost,
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what should I do ??
reset settings, reboot, etc. traversed path ...
all those negative emotions that it brought me completely overshadow the good ones like me using the phone if it can't even call normally !!?!?