1. bkkperson's Avatar
    I live in Thailand have a 9780 and it is T-Mobile branded, my provider has 850 and i can never seem to get a 3g signal but my mate who has a AT&T branded can.
    \
    Surely with a 3g spec on

    # Tri-band 3G HSDPA networks: 2100MHz/1900MHz/850MHz
    # Tri-band UMTS networks: 2100/1900/850/800 MHz and 2100/1700/900 MHz

    I should be able to pick up a 850 signal? Also i have seen discussions on T-mobile branded 9780 cannot be used on AT&T and i know they are a different band but surely the 9780 has all the bands covered?/

    cheers

    BKK
    04-28-11 02:05 PM
  2. bkkperson's Avatar
    Anbody have any idea?
    05-09-11 08:23 PM
  3. johnling's Avatar
    They use different frequencies on purpose. That way you have to stick with the provider you purchased the phone through. Be aware, some providers will no longer activate an unbranded phone or a phone branded to another provider.They know by the IMIE number what phone is branded to who.
    05-09-11 09:48 PM
  4. bkkperson's Avatar
    Thanks for the anwser but im still a bit puzzled, i understand they both run on different frequency but the 9780 has a triband 3g signal so it should pick up both frequency's no?
    05-10-11 12:56 AM
  5. dictoresno's Avatar
    Thanks for the anwser but im still a bit puzzled, i understand they both run on different frequency but the 9780 has a triband 3g signal so it should pick up both frequency's no?
    its not going to work. the t-mobile phone you own should cover 3G on 2100/1900/1700 only (Bands 1,2 and 4. check your "About" screen and tell us what bands they say).

    the at&t 9780 will cover 2100/1900/850/800 (Bands 1,2,5 and 6)

    your phone does not have 800/850, therefore wont get a 3G signal on your 850 Mhz network.

    some carriers that use more than one frequency, may not use both for 3G. if your network uses 850, your best bet is ditching your tmobile branded phone if you want to use 3G.
    Last edited by dictoresno; 05-10-11 at 01:39 AM.
    Laura Knotek likes this.
    05-10-11 01:36 AM
  6. dictoresno's Avatar
    just an fyi, i just realized u were calling your friends 9780 as a branded at&t model. at&t never released the 9780, so unless its a pre-release model, i think you guys are using a 9700. but either way, they are the same frequency wise.
    05-10-11 02:05 AM
  7. bkkperson's Avatar
    just an fyi, i just realized u were calling your friends 9780 as a branded at&t model. at&t never released the 9780, so unless its a pre-release model, i think you guys are using a 9700. but either way, they are the same frequency wise.
    Hi, thanks for clearing that up, you are right the band is 1,4 and 8 and i want to use 850, so that means that the carriers are locking the 3g aswell as the actual phone which is wrong!!

    My mate is using a branded AT&T Torch I was just using this as an example, it looks like im going to have to swap it for a 850 one somehow..

    Does 1,4 or 8 fall into 900mhz category?

    Cheers
    05-10-11 06:33 AM
  8. dictoresno's Avatar
    05-10-11 06:46 AM
LINK TO POST COPIED TO CLIPBOARD