Waveshare RM500x/RM502x 5G HAT for Raspberry Pi, quad antennas LTE-A, multi band, 5G/4G/3G

can it works in India's 2g-4g networks ??

Can i use rm520n-Gl module. ?

Will it support in Bangladesh though 5g is not here?

how much to buy it ?

So, using the RM502Q-AE 5G HAT, I can just put a normal 5G T-Mobile cellular SIM card (same SIM I'd put in a phone) in slot-1, and it will work?

Will this work in America on at&t or t-mobile