WiFi not getting connected. The Airtel Ftth wifi, which used to get connected previously, is not connected for internet. Error- can't connect internet

Though Home key is dry, getting message to make sure that home key is clean & dru again & again

I have Samsung S Edge 7 mobile & require to change battery. I inquired at many Samsung service centers in Pune. But no one has it & no one assured to make it available within even 10 days. I called samsung support. But the company also failed to make...