1, if the phone even other WiFi signal is relatively poor, there may be software or hardware failure of the phone, you can reset the phone to the factory state to eliminate it, or by the mobile phone after-sales service center professionals for a comprehensive test of the software and hardware of the phone.
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2, if the phone is only connected to a WiFi signal is poor, it is recommended to use the following methods to check:
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(1) Software error occurs in the operation of the WiFi router, it is recommended to power off the WiFi router and restart it;
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(2) Log in to the web background of the WiFi router and check whether the WiFi router configuration artificially reduces the transmission power of the WiFi signal;
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(3) Reduce the distance and physical obstacles between the mobile phone and the WiFi router to ensure good WiFi signal coverage quality;
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(4) Take a normal mobile phone to test the WiFi router to see whether the signal is normal, if the WiFi signal is also relatively poor, there may be a hardware failure of the WiFi router.