3G/UMTS bands. Confused - GSM-Forum

cafonabob1 · 12-16-2012, 08:00

This conversation is for UMTS data bands for 3G. Not GSM bands. I understand the 850/900/1800/1900MHz for voice. I am confused about 3G availability.

I am in NYC and I sell lots of unlocked Blackberry for customers to export, mostly to Latin America and Africa. I am a bit confused by the 3G. In the USA the major GSM players are AT&T and T-Mobile. According to what I can find, AT&T runs 850/1900MHz. T-Mobile runs 1700. You don't get 3G data on an unlocked T-Mobile phone with an AT&T SIM and vice-versa.

Africa it is 2100. Also there is 900.

Am I understanding it correctly? I have customers in Ecuador who insist on AT&T phones. This is obviously because they use 850/1900 UMTS and subsequently get 3G in Ecuador. But customers from other countries (venezuela, dominican republic, honduras) prefer T-Mobile phones but these countries don't use 1700MHz. According to what I can find outside of USA, Canada and Israel nobody uses 1700MHz.

A little confused on this. Due to the international nature of this board certainly someone has some advice to clarify for the benefit of all. Thanks in advance.

<::GSM PunJabi::> · 12-17-2012, 01:29

What is your question? Please clarify

theripboy · 06-08-2013, 23:57

850/900 is the 3g frequency.

Im from Dominican Republic, and the reason we buy more phones from Tmobile is cause the best Company here i has the 900 UMTS frequency. The 1700 frequency doesnt mean nothing in this case.

reymon1991 · 06-09-2013, 01:21

Quote:

Originally Posted by cafonabob1

This conversation is for UMTS data bands for 3G. Not GSM bands. I understand the 850/900/1800/1900MHz for voice. I am confused about 3G availability.

I am in NYC and I sell lots of unlocked Blackberry for customers to export, mostly to Latin America and Africa. I am a bit confused by the 3G. In the USA the major GSM players are AT&T and T-Mobile. According to what I can find, AT&T runs 850/1900MHz. T-Mobile runs 1700. You don't get 3G data on an unlocked T-Mobile phone with an AT&T SIM and vice-versa.

Africa it is 2100. Also there is 900.

Am I understanding it correctly? I have customers in Ecuador who insist on AT&T phones. This is obviously because they use 850/1900 UMTS and subsequently get 3G in Ecuador. But customers from other countries (venezuela, dominican republic, honduras) prefer T-Mobile phones but these countries don't use 1700MHz. According to what I can find outside of USA, Canada and Israel nobody uses 1700MHz.

A little confused on this. Due to the international nature of this board certainly someone has some advice to clarify for the benefit of all. Thanks in advance.

https://en.wikipedia.org/wiki/GSM_frequency_bands

in case from Honduras, band primary and secundary used is 850 gsm and 1900 gsm . and in 3g, 4g all operatores working 850 band,

the cellphone from T-mobile are cheaper

cal_guy · 06-14-2013, 02:13

Old GSM or 2G network: 850, 900, 1800, 1900 mhz (used by old dual/tri/quad band phones)

UMTS/HSPDA or 3G network: 850, 900, 1700, 1900, 2100 mhz (used by new 3G capable phones)

LTE or 4G network: 1700, 2100, 2600 mhz (Used by latest phones now a days)

and of course there are CDMA and iDen networks used by carriers.

2G, first introduced in 1992, is the second-generation of cellular telephone technology and the first to use digital encryption of conversations. 2G networks were the first to offer data services and SMS text messaging, but their data transfer rates are lower than those of their successors.

3G networks succeed 2G ones, offering faster data transfer rates and are the first to enable video calls. This makes them especially suitable for use in modern smartphones, which require constant high-speed internet connection for many of their applications.

4G is the fourth generation of mobile phone communications standards. It is a successor of the 3G and provides ultra-broadband internet access for mobile devices. The high data transfer rates make 4G networks suitable for use in USB wireless modems for laptops and even home internet access.

Hope this will help a few, thanks

12-16-2012, 08:00	#1 (permalink)
cafonabob1 No Life Poster Join Date: Apr 2010 Location: NYC/USA Posts: 733 Member: 1283129 Status: Offline Thanks Meter: 135	3G/UMTS bands. Confused This conversation is for UMTS data bands for 3G. Not GSM bands. I understand the 850/900/1800/1900MHz for voice. I am confused about 3G availability. I am in NYC and I sell lots of unlocked Blackberry for customers to export, mostly to Latin America and Africa. I am a bit confused by the 3G. In the USA the major GSM players are AT&T and T-Mobile. According to what I can find, AT&T runs 850/1900MHz. T-Mobile runs 1700. You don't get 3G data on an unlocked T-Mobile phone with an AT&T SIM and vice-versa. Africa it is 2100. Also there is 900. Am I understanding it correctly? I have customers in Ecuador who insist on AT&T phones. This is obviously because they use 850/1900 UMTS and subsequently get 3G in Ecuador. But customers from other countries (venezuela, dominican republic, honduras) prefer T-Mobile phones but these countries don't use 1700MHz. According to what I can find outside of USA, Canada and Israel nobody uses 1700MHz. A little confused on this. Due to the international nature of this board certainly someone has some advice to clarify for the benefit of all. Thanks in advance.

12-17-2012, 01:29	#2 (permalink)
<::GSM PunJabi::> Freak Poster Join Date: Sep 2011 Location: Hacking in Motion (HIM) Posts: 333 Member: 1664146 Status: Offline Sonork: 100.1611754 Thanks Meter: 68	What is your question? Please clarify

06-08-2013, 23:57	#3 (permalink)
theripboy Insane Poster Join Date: Sep 2007 Posts: 69 Member: 590338 Status: Offline Thanks Meter: 3	850/900 is the 3g frequency. Im from Dominican Republic, and the reason we buy more phones from Tmobile is cause the best Company here i has the 900 UMTS frequency. The 1700 frequency doesnt mean nothing in this case.

06-14-2013, 02:13	#5 (permalink)
cal_guy No Life Poster Join Date: Oct 2010 Location: Toronto, Canada Posts: 948 Member: 1430995 Status: Offline Sonork: 100.1613203 Thanks Meter: 312	Old GSM or 2G network: 850, 900, 1800, 1900 mhz (used by old dual/tri/quad band phones) UMTS/HSPDA or 3G network: 850, 900, 1700, 1900, 2100 mhz (used by new 3G capable phones) LTE or 4G network: 1700, 2100, 2600 mhz (Used by latest phones now a days) and of course there are CDMA and iDen networks used by carriers. 2G, first introduced in 1992, is the second-generation of cellular telephone technology and the first to use digital encryption of conversations. 2G networks were the first to offer data services and SMS text messaging, but their data transfer rates are lower than those of their successors. 3G networks succeed 2G ones, offering faster data transfer rates and are the first to enable video calls. This makes them especially suitable for use in modern smartphones, which require constant high-speed internet connection for many of their applications. 4G is the fourth generation of mobile phone communications standards. It is a successor of the 3G and provides ultra-broadband internet access for mobile devices. The high data transfer rates make 4G networks suitable for use in USB wireless modems for laptops and even home internet access. Hope this will help a few, thanks