goto
Settings >> mobile networks >> Access point names (apn) >> edit
- change Apn protocol to IPv4/IPv6
Check speed with these APN s
- jionet
- jiodata
- www
Always choose google severs for downloading (playstore,google drive,youtube etc.)
Try VPN if the speed is too slow
use
- Snap vpn
- turbo vpn
- vpn master
- opera vpn
use Loader droid android app for downloading
(choose 12 connections and 12 parts for better speed )