New 5G on 14.0.9 feature with bugs


Jan 1, 2023
This is more of a feature with side of bugs,
On Mi 11 Ultra 14.0.9 I can use 5G network for Telstra carrier in Australia, But when I upgraded to 14.0.11 It gave me the usual 5G. MMS doesn't work either. But that's fine because I can use another Sim card. I really want to know what feature or bug caused this as it would be really helpful, I am not getting 5G speeds just 4G speeds on 5G band, I need it because my school has really thick concrete walls and 4G reception is bad, 5G I get 2 Bars. but 4G doesn't ever work and gives me 3G