I'm currently having two;
1. Unifi Air (subscribed on 22nd October 2019)
2. Digi Infinite 150
Currently I'm using modem Huawei B315s-607 with these band specs;
HUAWEI B315s-607:
4G Band 1/3/7/8/28/40 (FDD 700/900/1800/2100/2600 & TDD LTE 2300Mhz)
3G BAND: DC HSPA+,HSPA+, HSUPA/HSDPA/UMTS/900/2100 MHz
GSM BAND : 850 / 900 / 1800 / 1900 MHz
At the same time, I also have iPad Pro 11.
I conducted test to see the speed.
So here's my result.
a. Unifi Air
i. Speedtest direct from iPad

ii. Speedtest from wifi (Huawei)

b. DiGi Infinite 150
i. Speedtest direct from iPad

ii. Speedtest from wifi (iPad)

Hence, looking at the result, it is the modem that forbid my Unifi Air to reach its full potential and DiGi have the best speed either direct or wifi.
In which it makes me think and I really need to have your guys advice here;
a. Which line i need to terminate?
b. Should I get Huawei B618 to replace my current Huawei modem?
Your kind advice is really appreciated.