1. ptsang4's Avatar
    I purchased a 3g Iphone, which was unlocked while I was waiting the day it was purchased. It was unlocked to firmware 2.2.1(5H11).

    I have been so frustrated with this phone. I first lost service with it the day after I bought it when I drove to Chicago for school. I live in the suburbs about 25 miles away so I figure I lost signal because I switched cells and it dropped the first and was unable to pick up the second cell. My only solution to regain service is to bring my old cell phone with me, install my sim (tmobile) in it and wait for it to receive service, then reinstall the sim in my iphone.

    I recently lost service without having traveled, and recovered service using the aforementioned sim card swap method.

    I am extremely anxious to find a remedy, because this is such a feeble problem to have with such a sophisticated phone. I have not modded, unlocked, or jailbroken a phone before, but have read a good deal about it form these forums. One of the things I have read about firmware 2.2.1 is that the baseboard cannot be downgraded to an older firmware. This complicates what I thought my only long term solution could be; downgrading to a level where it functions normally.

    If any assistance could be provided, I would truly appreciate it
    2009-05-17 12:13 AM
  2. upstateiphone's Avatar
    When this happens just toggle airplane mode. This will refresh the connection with the cell tower.
    2009-05-17 04:06 AM
  3. robertguero's Avatar
    OK not sure where your from but yellowsnow will not unlock 2.2.1 firmware. It can be jailbroken but not unlocked.
    2009-05-17 06:41 AM
  4. ptsang4's Avatar
    Toggling "Airplane Mode" does not work.

    F.Y.I. My phone's wifi works when I lose service. Additionally, I tend to lose service gradually; I.e. Loss of Internet, then I lose bars until service is completely disconnected. I'm in a great coverage area (Chicago) and I still can't get a signal.
    2009-05-17 09:46 AM
  5. sactownstar's Avatar
    Wifi should always work, whether or not you have internet service. What are your APN settings?
    2009-05-18 06:17 PM
  6. ptsang4's Avatar
    My APN setting is internet2.voicestream.com

    UPDATE: I am on a trip to Michigan from Chicago, and some interesting things have been occurring.

    1. When passing through on the way up I turned off (while I had both voice and data service) the phone by holding the button on the top along with the home button until it turns off like a hard restart. Upon turning the phone back on a few hours and a couple hundred miles later, the phone showed NO SERVICE.

    2. While within the residence, the phone goes to NO SERVICE without any traveling. This is something that does NOT occur in Chicago

    3. Data and Voice work independently from one another. Sometimes I'll have no service and only data, sometimes only voice and no data, and sometimes I lose both.



    I really need some help with this,isn't this the iphone genius forum....?
    2009-05-20 01:25 AM
  7. robertguero's Avatar
    Ok again I ask are you sure you are on 2.2.1 firmware?

    There is not an unlock software hack for the 2.2.1. So either you are on AT&T or you have a Turbo SIM.

    Why would you want to do a "hard restart" if the phone is working properly?

    The iPhone running on T-Mo does not pull as good a signal as other phones that are actually from T-Mo. I can have my wifes Razr setting right next to it and hers will have full signal and mine will have 2 or 3 bars. But I am also running with turbo SIM because the phone is a refurb and it was upgraded to 2.2.1 firmware with a 5.9 bootloader so cant down grade to 2.2 firmware to unlock. Anyway on fringe signal areas it does alot of "NO SERVICE" or "SEARCHING".

    The only thing the APN is for is data not phone siganl. BUT with out phone signal you dont have data. SO if your not getting signal it makes no difference what the APN is set to.

    The APN you have, internt2.voicestream.com, is the correct one if you have a data plan, from my understanding. The wap.voicestream.com is like T-Zones and is slower.

    Whats your "MODEM FIRMWARE" version?
    Last edited by robertguero; 2009-05-20 at 06:51 AM.
    2009-05-20 06:27 AM
  8. ptsang4's Avatar
    Firstly, I am positive that I am running 2.2.1, as that is what is stated in my settings.

    Secondly, my reasoning for having shut the phone off in a "hard restart fashion" was for experimental purposes, even though the phone was functioning properly. I was trying to see whether the phone signal was becoming corrupted while it was still connected to the network and passing through cells, or whether it would lose connection regardless of whether it was connected to the network and detected any physical movement at all through cells.

    As for it being unlocked, the store owner has shown me the phone and asked what network coverage I had. When I responded with "t-mobile" he said he would fix the phone to allow it to operate on that network. He hooked a usb cord to the phone and said he was either unlocking or jailbreaking the unit. I cannot recall whether I had given him my sim before or after he worked on the phone, and am well aware that this is important in unlocking the phone.

    Once he had finished with my phone, he made a call with it using my sim, and the phone worked correctly for two days until it lost service while driving to school in Chicago, from the suburbs.

    I am not sure whether a turbo sim is absolutely necessary for my phone to operate on the t-mobile network correctly. I would assume that there are other using their native t-mobile sims in unlocked or jailbroken phones successfully.

    I have seen threads which talk about how to mod down from 2.2.1 to 2.2, but I must have a baseloader of 5.8, and would be precluded from such an option if I am found to have a bootloader of 6.02. I am still away on vacation and I am not sure which version I have.

    Questions for the community

    1. Would downgrading and reinstalling lower level firmwares be a viable options and a fix for the problem of losing service?

    2. Is a turbosim the only sim which works on the iphone with t-mobile service?

    3. If the answer to the last question is yes, how would I go about transferring my current cell phone number to the new turbosim card?


    THANKS FOR THE ASSISTANCE THUS FAR!
    2009-05-21 01:51 AM
  9. Chefanim's Avatar
    Turbosim isnt a whole new sim card, its a piggy back sim and it sits on top of your current sim. I think it would be worth the couple bucks to try one and see if that helps your problem.

    Worst case scenario, you could sell the 3G and get a 2G, Mine never fails on T-mobile. Since the 3G doesnt work anyway, the only thing you are loosing out on is the (limited) GPS.
    So long, and thanks for all the fish
    2009-05-21 03:45 PM
  10. p7486w's Avatar
    Just my 2cents but sounds to me like you have either a defective phone or a horrible turbo sim. I'm leaning more toward the turbo sim. Take your sim out to make sure you have a piggy back and let us know. If you do then thats most likely the culprit just try a different one. I've been using a Gevey turbo sim for about six months now and its pretty stable maybe you can try one of these.
    2009-05-21 04:29 PM
  11. sactownstar's Avatar
    If nothing else is working, I'd just try putting epc.tmobile.com as the apn.
    2009-05-21 05:57 PM
  12. robertguero's Avatar
    APN is not needed for making phone calls.

    Ok i guess I will ask again:

    What firmware version is the phones modem on? setting>general>about>Modem Firmware.....at the very bottom.

    The above will answer everything. AS I SAID BEFORE there is not an unlock for 2.2.1. Unless a special firmware load was used. But modem firmware will tell ALL.

    I think I am just going to stop asking cause it seems like you just ask questions and then make your own assumptions.

    I have the Gevey Turbo SIM and have major issues with it in low signal areas. I am on 5.9 bootloader so turbo SIM is the only way to go for me.

    OH and if it aint broke, dont fix it. Hard reset on the phone may have caused you more issues. Especially since it was working before. There are still dead spots EVERYWHERE in the country. Even in major cities downtown. So driving thru an area and not getting signal is a common thing. I travel alot and in very rural areas. You just have to let the phone do its thing. If you have no service let it try to find it. If you have traveled more than 15 or 20 miles and still no service then get worried about what your phone is doing.

    Oh and NO....SIM card is not needed to unlock or jailbreak phone.

    Also do you have "Enable 3G" ON or OFF?
    Last edited by robertguero; 2009-05-21 at 08:40 PM. Reason: Automerged Doublepost
    2009-05-21 08:39 PM
  13. ptsang4's Avatar
    Robertguero, When I said I was positive that I was running on 2.2.1, I meant the version was 2.2.1 (5H11). I apologize for any confusion this may have caused. I do not profess to be an expert on computers or the like. I am a law student, not a IT specialist, hence I have deferred to this knowledgeable forum. I ask that you have a bit more patience, please.

    Modem Firmware is 02.30.03. I am unsure of how to access the bootloader information and whether it is pertinent or not.

    The problem related to the phone's loss of signal is not related at all to signal strength, I am absolutely positively sure of this. There must be some sort of issue with the software which is overcome once the sim is placed in another phone, and transferred back to the iphone.
    2009-05-21 10:40 PM
  14. GenesisDH's Avatar
    Robertguero, When I said I was positive that I was running on 2.2.1, I meant the version was 2.2.1 (5H11). I apologize for any confusion this may have caused. I do not profess to be an expert on computers or the like. I am a law student, not a IT specialist, hence I have deferred to this knowledgeable forum. I ask that you have a bit more patience, please.

    Modem Firmware is 02.30.03. I am unsure of how to access the bootloader information and whether it is pertinent or not.

    The problem related to the phone's loss of signal is not related at all to signal strength, I am absolutely positively sure of this. There must be some sort of issue with the software which is overcome once the sim is placed in another phone, and transferred back to the iphone.
    I have a strong feeling that the issues you're having is solely related to the TurboSIM version you're using, not anything specific to the iPhone itself.
    Piggyback SIMs are very fickle in numerous situations, so there may not be a simple fix besides buying a new piggyback SIM or attempting to see if an downgrade & unlock is possible.

    The easiest way to determine what bootloader you have is to download Fuzzyband 3G Downgrader in Cydia and run it. It'll tell you what bootloader you have and if you're phone can/can't be downgraded to a 2.28 yellowsn0w-able baseband.

    Downgrading the baseband and using Yellowsn0w (if possible) is probably your best bet for using your phone on T-Mobile without frequently signal loss (like what can happen with piggyback SIMs)... at least until the Dev Team release an unlock solution for 3.x.
    Member of the hackint0sh forums.
    HowardForums Member: Haas_Dave
    2009-05-22 03:23 AM
  15. ptsang4's Avatar
    GenesisDH, I am currently using a T-mobile SIM with the iphone. I was simply speculating in my other posts as to whether a Turbo SIM would fix my problems...

    Thanks for the input thought, especially regarding the bootloader. I'll run that now and let everyone know what I find.
    2009-05-22 04:56 PM
  16. robertguero's Avatar
    I have a strong feeling that the issues you're having is solely related to the TurboSIM version you're using, not anything specific to the iPhone itself.
    Piggyback SIMs are very fickle in numerous situations, so there may not be a simple fix besides buying a new piggyback SIM or attempting to see if an downgrade & unlock is possible.

    The easiest way to determine what bootloader you have is to download Fuzzyband 3G Downgrader in Cydia and run it. It'll tell you what bootloader you have and if you're phone can/can't be downgraded to a 2.28 yellowsn0w-able baseband.

    Downgrading the baseband and using Yellowsn0w (if possible) is probably your best bet for using your phone on T-Mobile without frequently signal loss (like what can happen with piggyback SIMs)... at least until the Dev Team release an unlock solution for 3.x.
    @pstang

    What I think GenesisDH is trying to say is you ARE running a TurboSIM. From the version of modem firmware you have to be. Yellowsb0w will not work on this version firmware. SO your porblem lies in the turboSIM just as does mine. In the past few days I have been having issues, major issues running it on AT&T of which my roaming here. You traveling thru different areas you my be getting the same thing. Pop your SIM out and see if there is a thin piece of see thru plastic with a chip on it. Possibly look somthing like this:
    http://tbn1.google.com/images?q=tbn:...s/DSCN3621.JPG
    2009-05-22 07:22 PM
  17. ptsang4's Avatar
    Ok Guys, I understand what a piggyback sim is now! I had thought that because of the unique manner in which the sim is inserted, apple needed to place a "contact chip" on the back of the SIM. I looked closer at the small "chip" that is under my SIM, and it says in micro prince "UNIVERSAL-SIM.com". Once I saw the website I knew it wasn't an OEM iphone part, and now I know that it must be a piggybacking sim device to unlock the phone.

    Which would you reccomend? Should I try to downgrade the phone and remove the piggybacking SIM, or should I try a more reputable piggybacking SIM system? Are universal-sims reputable and reliable? Which unlockable firmware is most stable?
    2009-05-22 08:33 PM
  18. robertguero's Avatar
    Which would you reccomend?
    Wait for new firmware unlock.

    Should I try to downgrade the phone and remove the piggybacking SIM, or should I try a more reputable piggybacking SIM system?
    Not sure what your going to ungrade to as it has been said several times above "there is not an unlock for 2.2.1 firware".

    Are universal-sims reputable and reliable?
    From what I have read certain ones work on certain systems BUT cant say that is true. They all work about the same so...Honestly just ride it out with what you got and dont expect miracles and dont beat your phone up. Just make sure you carry your old phone with you just in case you REALLY need a phone.

    Which unlockable firmware is most stable?
    For unlocking the 2.2 but you cant down grade as you probably have a 5.9 or higher bootloader and this is the reason the guy at eh store went with the turbosim. If they phone was produced or refurbed from Apple then it probably has 5.9 or above bootloader which does not have an unlock for YET. I too am waiting patiently for this unlock as my Gevey TurboSIMM ....SUCKS

    Just called the supplier and advised of everything going on with the phone and he suggested restore and jailbreak again. Well did just that and now its worse. Cant even pickup the strong roaming service I have here. Its to the point where it will not even try to connect. He said he will send another as the one I have may be defucktional. I have had issues pretty much since I got it.

    how long have you had your phone?
    2009-05-23 09:34 PM
  19. robertguero's Avatar
    Well the past two days were great. Not at home so figured I would use iPhone 3G. Figured since i was out running around it would work better. In the middle of nowhere Mississippi and the it works no prob. Except for I dont have data, just phone signal. Well I did have it but then did not the next morning. So thats kool atleast it works. Yep got the Gevey TurboSIM in there. So everything is great but get back into Memphis,TN and get a phone call which it drops after about 20-30 seconds. Look at phone and it has 4-5 bars, so thought it was the other guy. Waited and waited on him to call back but he didnt so I called. Again 20-30 seconds and it dropped. So just figured forget I will talk later. Tried to call voicemail and phone just set there then finally timed out "Call Failed". Turn phone OFF and back ON, now I get "searching" then "No Service". Here I am in a T-Mo 3G coverage area (3G off on phone) and I cant get signal. So turned phone OFF and let set for about 15 minutes. Turn back ON and still the same. Glad i brought the backup phone. Popped SIM in T-Mo Dash and works fine. These TurboSIMs are so....to me just crap.
    2009-05-29 09:47 AM
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