When buying phone, does GSM (850,900,1800,1900) type support matter? What type of GSM we r currently using? All telco use same GSM right?

you in malaysia?

We're on GSM 900 / 1800MHz (called Dual Band), frequency 1900 is not for Malaysia, if a mobile device uses 900 / 1800 / 1900MHz (Tripple Band).

All telco's in Malaysia now supports Dual Band !

I believe for Celcom its GSM 900.

now they're on Dual Band

thank you. anyway, what dual-band for? and does higher frequency means better?

This post has been edited by Coisox: Dec 26 2011, 12:29 PM

GSM-900 and GSM-1800 are used in most parts of the world: Europe, Middle East, Africa, Australia and most of Asia. In South Americas it is in Costa Rica (GSM-1800), Brazil (GSM-850, 900 and 1800), Guatemala (GSM-850, GSM-900 and 1900), El Salvador (GSM-850, GSM-900 and 1900).

GSM-900 uses 890–915 MHz to send information from the mobile station to the base station (uplink) and 935–960 MHz for the other direction (downlink), providing 124 RF channels (channel numbers 1 to 124) spaced at 200 kHz. Duplex spacing of 45 MHz is used. Guard bands 100 kHz wide are placed at either end of the range of frequencies.


In some countries the GSM-900 band has been extended to cover a larger frequency range. This 'extended GSM', E-GSM, uses 880–915 MHz (uplink) and 925–960 MHz (downlink), adding 50 channels (channel numbers 975 to 1023 and 0) to the original GSM-900 band. The GSM specifications also describe 'railways GSM', GSM-R, which uses 876–915 MHz (uplink) and 921–960 MHz (downlink). Channel numbers 955 to 1023. GSM-R provides additional channels and specialized services for use by railway personnel.


All these variants are included in the GSM-900 specification.

GSM-1800 uses 1710–1785 MHz to send information from the mobile station to the base tranceiver station (uplink) and 1805–1880 MHz for the other direction (downlink), providing 374 channels (channel numbers 512 to 885). Duplex spacing is 95 MHz.

GSM-1800 is also called DCS (Digital Cellular Service) in the United Kingdom, while being called PCS in Hong Kong (not to mix up with GSM-1900 which is commonly called PCS in the rest of the world.)


Source: Edaboard.com

err...emm..uhh... so i have asked a wrong question
it's dual band. i got it

Welcome to 2021 , 10 years later...
(Yes I intentionally necro this thread )

I just resurrected my K750i after sleeping for 10 years; replaced the dead battery with a new Battery.
Edit: I already solved the mystery
Goto Settings - Connectivity - Mobile Network - Prefered Network - New Network -
then key in the MNC Network code 502190 and voila - It works.
https://www.skmm.gov.my/skmmgovmy/media/Gen...k-Code-2017.pdf

Original problem underneath spoiler


This post has been edited by SleeplessEyes: Feb 1 2021, 07:00 AM