Question

Which is a better frequency band for gsm 900 or 1800?

Answer 1

The 900 Mhz band has a superior commercial ecosystem than 1800Mhz. That's because 900 Mhzfrequency band has been in use for mobile communications globally for over 20 years and as a result technology standards have been betterdeveloped compared with 1800 Mhzband, which has been in use only recently.
i hope this will help u

Answer 2

I think the 900 MHz is a better frequency band than 1800 MHz because 900 Mhz frequency band has been in use for mobile communications globally for over 20 years and as a result technology standards have been better developed compared with 1800 Mhz band, which has been in use only recently.

I hope it helps.