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4G error

Star I
Please tell us some basic information before asking for help:
Model Name: rog phone 5s
Firmware Version: 18.1220.2202.206
Rooted or not: 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.
Since i upgraded to 18.1220.2202.206 i havent connect internet (4G) but if my sim card lock to 3G my device going normal to comnect inet