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Discuss Unlocked iphone but have problem! at the iPhone "2G" (Rev. 1) - Hackint0sh.org; I was able to successfully unlock 2 iphones. The problem I am having is that ...
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    Default Unlocked iphone but have problem!

    I was able to successfully unlock 2 iphones. The problem I am having is that when I put in a Sim card for a provider that uses 900/1800 GSM Frequencies it does not work. There is full signal strength and the provider name comes up on the display, however when you place a call, as you press send it comes up call ended and drops the call. When I put in a sim card from another provider that uses 850/1900 Frequency it works fine. This is being experienced with both phones. Any ideas??



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    Where do you live that you are expecting to receive all four GSM bands at the same time? Perhaps someone from your area will chime in with their experience.

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    It's not that I think I should be receiving all 4 frequencys at the same time. The unlocked phones will not work with a provider using a frequency of 900/1800!

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    You should catch the drift, shoulnd't you? US use 850 and 1900

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    Quote Originally Posted by LA20 View Post
    You should catch the drift, shoulnd't you? US use 850 and 1900
    Considering the iPhone is a quad band phone then it should work on either of your carriers. However, some carriers provide better coverage on some bands versus the others. You should try with the dropping calls sim card in another location.


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    His concern was about 900/1800 vs 850/1900.

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    The phone is a quad band phone so it should work on those frequencys. How am i to catch teh drift from any of those replies? I am in Jamaica and we have all 4 bands, I guess we aint third world after all!

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    I didn't know you are not in US. and I am not sure about Jamaica, there are people using iphone on Asia on 900/1800 band

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    Oh sorry I didnt mention I was in Jamaica, I did try the card in anopther location and teh same problem. I also experienced this same thing with a blackberry pearl back in Oct. 060 when Tmobile came out with it. I unlocked it and experienced teh same prob, had to sell the phone.

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    Quote Originally Posted by jeffjam View Post
    The phone is a quad band phone so it should work on those frequencys. How am i to catch teh drift from any of those replies? I am in Jamaica and we have all 4 bands, I guess we aint third world after all!
    Try the non working SIM in some other location away from your current location. If it works there you have a coverage issue in your location. I had the same issue with a motorola L6. It was a tri-band phone 900/1800/1900. It would not work in my house using a SIM from provider A yet a SIM from provider B would work. When I got the quad band L7 with the 850Mhz band, then provider A stopped having issues.

    I assuming since you're in Jamaica you are using Digicel or Cable and Wireless.


 

 
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