If you are facing WiFi problem in Nokia Lumia 510 then you will not be able to connect internet with wifi support. It might be fault of wifi antina in the phone or ic fault.
Wifi problem can be due to water damages or damage parts in it. To solve the issue in first step must check out that you how long distance is between you and the source of internet wifi router.
In second step disassemble the Nokia Lumia 510 and check out the motherboard for water and rust damages.
If you find some rust or carbon then clean it wit electronics cleaner and apply heat to make it dry.
Check all parts and components that are shown in diagram above.
WiFi Problem, WiFi Jumpers, WiFi Solution, WiFi Not Working
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