Question no internet connection when switching from 3G to 4G

[Shala1122]

hello everyone, im having an issue on my poco f3 it happens on both miui official, eu v13 & 14
like title says, whenever switching from 3g to 4g there is no internet connection and i have to turn airplane mode on and off for it to work again...
you can trigger this issue by going to settings and manually changing to 3g and then back to 4g, but it can also happen automatically if the signal is low...
does anyone else experience this issue? is there any fix for this?

 

[3zozHashim]

hello everyone, im having an issue on my poco f3 it happens on both miui official, eu v13 & 14
like title says, whenever switching from 3g to 4g there is no internet connection and i have to turn airplane mode on and off for it to work again...
you can trigger this issue by going to settings and manually changing to 3g and then back to 4g, but it can also happen automatically if the signal is low...
does anyone else experience this issue? is there any fix for this?

3 possible reasons:

1) When youre using 3g, your phone is connected to the best signal 3g tower nearby, switching to 4g makes your phone use the same tower (could be a low signal 4g). When you turn airplane mode on and off, the phone connects to the best signal 4g tower nearby.

2) Faulty SIM card

3) Phone faulty hardware

 

[Shala1122]

3 possible reasons:

1) When youre using 3g, your phone is connected to the best signal 3g tower nearby, switching to 4g makes your phone use the same tower (could be a low signal 4g). When you turn airplane mode on and off, the phone connects to the best signal 4g tower nearby.

2) Faulty SIM card

3) Phone faulty hardware

Thank you for your comment.
I dont think the SIM is faulty simply because when i insert it to my redmi note 9s, this issue does not exist.
does your poco dont behave like this?

 

[jefffrom]

country carrier always helps , what bands ? phone version global? that helps , https://www.kimovil.com/en/frequency-checker/US/xiaomi-poco-f3

 

[Shala1122]

country carrier always helps , what bands ? phone version global? that helps , https://www.kimovil.com/en/frequency-checker/US/xiaomi-poco-f3

Israel, pelephone carrier. phone global version from official poco store on aliexpress
happend on stable eea miui 13 & 14 also on global 14 and xiaomi eu 13 & 14