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General Questions
System Application
How to set and add new APN parameters on the phone?
How to check the APN parameters of the carrier on the mobile phone?
What should I do if I can't use the data network during a call?
What should I do if there is no signal after installing the SIM card, I can't make calls, I can't use the mobile network, and I can't send text messages?
What should I do if the SIM card is not recognized after I install it?
What should I do if I am unable to access the internet using a data network?
What should I do if the device signal is not good?
What should I do if the WiFi connection speed is slow?
What should I do if my WiFi signal is weak?
What if I can connect to WiFi but can't connect to the internet?
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