if u are encountering same problem that I have then this would help you. |
when u turn on the Internet on bsnl selecting the mode wcdma preferred u will get 3g some time then 2g.
first of all go to settings-about phone-click internal memory(several times)-a new window will appear there u see phone information(click on which u have inserted bsnl)-there u see a option of preffered network type select it to wcdma only..... that's it you have fixed the problem. now run internet only on 3g
[Tips] (solved) bsnl 3g problem in redmi note 4,automatically changing to 2g