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Discuss Why so poor GSM signal strength? at the iPhone "2G" (Rev. 1) - Hackint0sh.org; It is just terrible... going along the street the signal may just dissappear... for no ...
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    Default Why so poor GSM signal strength?

    It is just terrible... going along the street the signal may just dissappear... for no reason... in office I have to pray for iPhone to start receiving calls... cuz generally is says "NoService"
    As I figured out my iPhone was downgraded from 1.1.1. to 1.0.2 for an Unlock... simultaneously the baseband was also downgraded to 03.14.08_G
    May that be the source of a problem? is the signal strength in 1.1.1. with baseband 04.01.13_G better?
    And if there is a chance to upgrade my iPhone back to 1.1.1. and baseband 04.01.13_G (or upgrade just a baseband) and to have it unlocked and activated, bearing in mind that I have no idea how it was unlocked and activated ofter downgrade?

    thank you.



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    m1c
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    If you live in the USA the poor signal strength is most likely the result of a distinct underinvestment in base stations by US operators. This was caused by the lack of a requirement for geographic coverage as a condition of the licenses as written by the FCC and the natural tendency of US operators to only think of the next quarters financial performance. This also allowed for the US treasury to receive billions of dollars 'extra' for the sale of 'our' spectrum.

    But I rant....

    Do you normally have good service in the area you speak of ? From the operator that your iPhone is currently using? If you switched operators as a result of unlocking, know that the performance of one operator in a given area can be very different from another (in any country). Also, it could be a temporary network issue.

    I have not seen other posts regarding link performance after upgrade / unlock, but maybe others have issues and have not reported or noticed it yet.

    Has anyone found / made a network reporting tool ala the old Nokia Network tool you could get to with keypad input? If so, you could use that and actually see the signal strength and possibly compare it to another phone. The signal strength display that is given to consumers are notoriously wrong - best thought of as a 'no service, poor, good' metric rather than 1,2,3,4,5 bars.

    Sorry I could not be of more help. If I find out more, I will post back

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    The signal strength is in no way related to the firmware, as far as I can tell. GSM networks tend to be quite picky about reflections and interference. I don't think that upgrading or downgrading the baseband gives any significant change on reception of GSM signals.

    Just make sure that you don't cover the bottom of the iphone with your hand, since the GSM anrenna is located behind the black plastic cover this alone has changed reception for me dramatically at home, where I usually have only bad reception on GSM 1800 networks.

    Cheers,
    budy

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    The reason why I am asking is very simple - I have two cells (on of them is iPhone) lying on the table side by side with the same operators' sim-cards inside... the first one (it is HTC S620) shows full bar while iPhone shows "no service"... I just don't get it...

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    m1c
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    That does point to a problem with the iPhone - if you have not already done so, take these steps:

    Try rebooting the iPhone - it is possible that it has 'camped' on a weaker serving cell site rather than the dominant one (but unlikely), or are on an overlay cell when you are meant to be on the underlay.

    Again not likely an issue, but, - turn off the other phone and check the iPhone again - maybe the other phone has an issue.

    Move to different parts of the room - slow fading of the RF serving signal can cause dramatic differences in signal strength even over a small distance (i.e. one side of the room or another.

    More drastically, you might virginise the phone and see if that changes anything.

    If that doesn't work at least it will then be ready to take back to Apple (assuming you have access to US stores). Electronics can go bad, wires to antennas can come loose, etc.

    Good luck


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    I can certainly releate. I used my iPhone for 1 week with ATT never saw the NO SERVICE, in the last two days after the unlock i've seen it four or five times in areas where i had full servive. But it's not just with the iPhone i've used unlocked phones before and had the same issues (these are fresh from manufacturer), i'm convinced it's something to do with the software packs they use in their branded phones and it's not just ATT it's also the same w/TMO.

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    Thank you... I will do the following - I will test my friend`s iPhone with my sim-card...
    Because if I virginize the iPhone - it will be back locked and non-activated.. and I won`t be able to check its signal strength in any way untill it is unlocked and activated again... ))

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    I have the same issue. I'm outside the US and have a OTB v.1.1.1 unlocked w/ anySIM, jailbreaked at the .com, and everything was fine. Today, all off a sudden the signal dropped to 1 bar and went back to full in one or so minutes intervals. Ocationally, it goes to NO SERVICE, but mostly 1 bar. I'm having a hard ti receiving calls.

    In my case, I've proven it's not network related. It's the phone and I thing it's software. I've read 4 threads with this same problem.

    Please post solutions when they come around.

 

 

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