3 thoughts on “T-Mobile, EDGE Yes, 3G No”

  1. Don’t believe the hype. Ability to deliver 3G is not about spetrum, it is about network density. To get good throughput you need to have an RSSI in the -70s (dBm). If you have that, you can squeeze the hell out of your 2G spectrum using better codecs to free up the spectrum for 3G. Therefore, network quality good enough for 3G = enough spectrum for 3G. It’s no surprise that the carrier being the most agressive in rolling out 3G (Verizon) is the one with the best network in terms of RSSI.

  2.   The amount of bandwidth needed for 3G services could be as much as 15-20 MHz. Compare this with the bandwidth of 30-200 KHz used for current 2G communication and you can see that there is as much as a 500-fold increase in the amount of bandwidth required. Now you can appreciate why radio spectrum has become such a precious and scarce resource in the information age – everybody from television broadcasters to the military wants spectrum, and it is in short supply. The telecoms operators have had to buy 3G spectrum from governments around the world, and those governments – realising that they own a precious, valuable resource – have sought to sell that spectrum at the highest possible price.

          Radio spectrum is often organized (and sold) as paired spectrum – a bit of spectrum in a lower frequency band, and a bit of spectrum in an upper frequency band (see the section on 3G Technology for an explanation of paired spectrum). Paired spectrum is often specified in a form like “2x15MHz” meaning 15MHz in a lower band and 15MHz in an upper band. This technique of two users talking to each other on two separate frequencies is called Frequency Division Duplex, or FDD (see the section on 3G Technology for an explanation of FDD). W-CDMA is an FDD technique (i.e., it requires paired spectrum) whereas TD-CDMA is a TDD technique (i.e., it can use unpaired spectrum).

  3. hi, I like the website! however, I am new to this and being very fascinated with today’s technology and especially when it comes to phones, Id really appreciate it if 2 questions were answered for me:
    1) whats reallt the difference between 3G and EDGE?
    2) which is better? faster?

    I am debating whether to buy the K790i or the K800i sony ericsson phone. Thank you very much!


Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.