Net is not working even if data connection is on, and its normally happen whan connection is week. In my case its in evening because in my area the number of user  using internet increases at evening while the day its works fine because mostly people...

Anyone suggest me a quaily one otg which works on samsung a50, i tried local one and essager company but both didn't  work

There should  be an option for lock the phone without using power button.like double clik gesture  or an icon on quick bar.