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WiFi is used for networking a Smartphone with some other networking devices and it works for VPN (Virtual Private Network ) to gain a high speed broadband speed at you smart phone Nokia 2320 Classic Hang problem solutionsee all cellular mobile repairing solution
in above diagram you can see a red line that identify parts used in wifi function in Nokia Asha 311.So after disassemble of mobile phone look all these parts very carefully and if there is some rust or water damages clean them with electronics cleaner and apply smoth heat with hot air. do not apply to much air because it can harm your skin and also can damage the mother board.
So re flow resold these parts and if it can not solve problem replace these parts that are given in above diagram.
for more detail and new tips and tricks about cellphone service problem keep visiting this page we will update cellphone service diagrams timely with new cellphone diagrams.some related post are also given bellow you can read them also for more information about cellphone.