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  • Verizon iPhone Has Dual-Mode GSM/CDMA Chip


    Separate teardowns of the Verizon iPhone 4 done today by iFixit and 9to5Mac have both determined that the new phone's cellular modem is compatible with both GSM and CDMA, lending credence to rumors that future iPhones will be dual-mode "world phones," with the same device able to work on networks using either cellular standard. The Verizon phone cannot be used on a GSM network, as it lacks a SIM card, but the inclusion of this chip suggests that Apple may move away from separate GSM and CDMA product lines as soon as the next iPad.

    The Qualcomm MDM6600 "Gobi" chip found inside Verizon's iPhone 4 - the same one that's in Motorola's Droid Pro world phone - supports both GSM HSPA+ with data rates up to 14.4 Mb/s and CDMA's 1xEV-DO rev. B with data rates up to 4.9 Mb/s (though Verizon's network currently only uses rev. A which maxes out at 3.1 Mb/s). The Verizon phone will only work on CDMA systems not only due to the lack of a SIM but also because of the antennas: as iFixit notes, "this phone supports two cellular frequency bands, while Apple supports five bands in the GSM version."

    Another minor change noted was the moved and redesigned vibrator which, as iFixit found, has a "quieter, softer feel, and makes a better sound when on a table." Apparently this is a linear vibrator, rather than the counterweighted rotating electric motor used in the GSM iPhone 4.

    Source: MacRumors, image via iFixit
    This article was originally published in forum thread: Verizon iPhone Has Dual-Mode GSM/CDMA Chip started by Paul Daniel Ash View original post
    Comments 29 Comments
    1. Italia411's Avatar
      Italia411 -
      I can't see Verizon selling a smart phone or let alone a iPhone that can some how be unlocked to their biggest competitors network. I agree some hardware will be absent. I'm sure that's printed 100 times in Verizon's contract with apple.
    1. Orby's Avatar
      Orby -
      Quote Originally Posted by Italia411 View Post
      I can't see Verizon selling a smart phone or let alone a iPhone that can some how be unlocked to their biggest competitors network. I agree some hardware will be absent. I'm sure that's printed 100 times in Verizon's contract with apple.
      Technically, this device /can/ be unlocked to AT&T's network. The MDM6600 can be used on at least 850/1900/2100 MHz for WCDMA (that'd be HSPA+/UMTS; AT&T frequency-land) and I imagine it's quad-band (850/900/1800/1900 MHz) for GSM.

      The trick would be, of course, enabling the GSM/WCDMA radio, and convincing the device it has a SIM with a particular IMSI/ICCID (and probably IMEI too) without actually having a SIM card in there. Most likely, extremely illegal (IMEI cloning would be necessary).

      PS: You should also note this Qualcomm chip controls all GPS functionality as well, superseding the Broadcom BCM4750 in the iPad and N90 model.
    1. amoamare's Avatar
      amoamare -
      I figured I would chime in my thought on this.

      Most Verizon phone's that come out specially the world phones are GSM/CDMA capable, take for instance the World Droid, Blackberry Storm 1 and 2 and most newer blackberrys.

      I can almost promise that the iphone will more then likly be the same iphone from at&t to verizon, specially on next iPhone release.If verizon follows what sprint has been doing and what they have recently started to do. It will most likly have a LOCKED baseband. Meaning it will be a GSM/World CDMA phone. But the bands will only be for outside the USA even though it can support the USA bands verizon will more then likly have them locked out, so even if you sim unlock the phone will not pick up service untill the baseband is either replaced or modified.

      Droid World is like this
      Touch Pro 2 from sprint is like this..
    1. scroogelives's Avatar
      scroogelives -
      Quote Originally Posted by feidhlim1986 View Post
      They will still have to make a version with a SIM card tray and slot and a version without. Until the talked about built-in SIM, but I don't see iDevices having that this year and hopefully never.
      Most networks have ruled out sim less iphones, prob feel apple taking too much control!
    1. Italia411's Avatar
      Italia411 -
      Quote Originally Posted by DRFP View Post
      How do you use them over seas? most phones unlock and then pop in a free sim over seas and pay as ya go.....................

      Sometimes why do we buy into apples crap?
      Probably a sim puncher. It cuts your sim into a micro sim. They sell those on eBay too.
    1. Italia411's Avatar
      Italia411 -
      Quote Originally Posted by orbyorb View Post
      Technically, this device /can/ be unlocked to AT&T's network. The MDM6600 can be used on at least 850/1900/2100 MHz for WCDMA (that'd be HSPA+/UMTS; AT&T frequency-land) and I imagine it's quad-band (850/900/1800/1900 MHz) for GSM.

      The trick would be, of course, enabling the GSM/WCDMA radio, and convincing the device it has a SIM with a particular IMSI/ICCID (and probably IMEI too) without actually having a SIM card in there. Most likely, extremely illegal (IMEI cloning would be necessary).

      PS: You should also note this Qualcomm chip controls all GPS functionality as well, superseding the Broadcom BCM4750 in the iPad and N90 model.
      Nice thanx for that info. I wonder if the hardware could be modified so a sim would fit.
    1. Snozberries's Avatar
      Snozberries -
      Quote Originally Posted by Italia411 View Post
      Probably a sim puncher. It cuts your sim into a micro sim. They sell those on eBay too.
      eBay, Helping China sell blackmarket goods to the masses at a discount.

      +1
    1. Mrteacup's Avatar
      Mrteacup -
      I'm guessing they figured they make a heck of a lot more money if it's unlockable because iPhones cost 600 $ more
    1. flash66's Avatar
      flash66 -
      Lets see how BASIC this should be...
      10 IF the firmware for GSM is there then goto GOBI (dual chip)
      20 THEN goto hardwire mod for SIM
      GOTO 10

      RUN