The phone's silent button has a loose connection and the home button ribbon is torn. Replacing the ribbon for 250 BDT will make it work including the fingerprint sensor. Network works, SIM works, everything is okay except Wi-Fi, which needs to be serviced. Many might think this is bypassed, but if it were a bypassed phone, the SIM wouldn't work; Wi-Fi connects occasionally.
Only interested buyers should ping on WhatsApp.