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  • Warning: ultrasn0w May Break GPS on Baseband 6.15.00


    The Dev-Team is warning about a potential issue with ultrasn0w for iOS 4.2.1 on iPhones with the 06.15.00 baseband. An increasing number of users with that version of the baseband software are reportedly losing GPS functionality when they unlock their device. The blog post says they are looking for the root cause but haven't found it yet, and notes that it's not a problem for all or even most users with that baseband. Still, to be on the safe side, they're suggesting people should just not expect GPS to work if they want to unlock iPhones with the 06.15.00 baseband using ultrasn0w:

    Update #5: Unlockers have been reporting mixed results about GPS functionality at 06.15.00. Until we can track down what differentiates those who retain GPS vs. those who lose it, be conservative and assume you’ll lose GPS at 06.15.00. As we work on finding the cause (and possibly a fix), please report your personal findings in our comments section. (Update: early indications are that while 06.15.00 is capable of GPS, it will require some further hacks. But please still be conservative and assume you will lose GPS at 06.15, in case the hacks don’t work).
    Source: Dev-Team Blog
    This article was originally published in forum thread: Warning: ultrasn0w May Break GPS on Baseband 6.15.00 started by Paul Daniel Ash View original post
    Comments 175 Comments
    1. iCass's Avatar
      iCass -
      Quote Originally Posted by hellodrsoul View Post
      I spent 5 days trouble shooting this GPS problem on my 3GS with iPad baseband. I tried from 3.1.2 to 4.2.1 firmwares. I tested it before and after unlocking with ultraslow 1.2, and with and without SAM installed. I needed to hactivate every time I restored. Nothing will fix this GPS problem. I assume it is surely iPad baseband, as my phone GPS was working fine on 3.1.2-4.1, with their respective basebands. If this is a problem on a larger scale, we should a fix. Also same GPS problem may be related to severe battery drain, as my phone's turns off randomely

      I spent 5 days trouble shooting this GPS problem on my 3GS with iPad baseband. I tried from 3.1.2 to 4.2.1 firmwares. I tested it before and after unlocking with ultraslow 1.2, and with and without SAM installed. I needed to hactivate every time I restored. Nothing will fix this GPS problem. I assume it is surely iPad baseband, as my phone GPS was working fine on 3.1.2-4.1, with their respective basebands. If this is a problem on a larger scale, we should a fix. Also same GPS problem may be related to severe battery drain, as my phone's turns off randomely with location turned on, and behaves completely normal with location turned off.
      Battery drain is due to Push Notifications when Hacktivation method is used. That's what the SAM patch is for. No legit activation means invalid certificates/keys for your apps push Notifications. This means push can never contact servers but continues to cycle (fails to establish connection, tries again, fails again, tries again, and so on). This means that without your knowledge your iPhone is constantly connected (explaining why some complain of higher data transfer rates since JB and unlock) and actively transferring over Internet (explaining why people with Edge only - no 3G connection - are complaining of not receiving any of their phone calls...active Edge transfer does not switch off to give priority to voice calls, therefore your calls go to voicemail). This constantly running and attempting to make a connection also drains your battery. Simplest fix: turn off Push Notifications in your iPhone. Or try installing SAM (don't forget to deactivate through RedSn0w after installing). Or buy PushFix in Cydia. Voilà!
    1. coolguy123123's Avatar
      coolguy123123 -
      Any Lead way on the GPS problems for the 3gs? Haven't checked on it since 3 weeks ago. I heard the dev team was working on a bb downgrade.
    1. iForm's Avatar
      iForm -
      the dev-theam not be able to downgrade latest baseband's (or 6.15) !
      Quote Originally Posted by marc View Post
      Sure, is a apple trap for dev-Team, that’s why they have leave the ipad firmware 3.2.2 with baseband 06.15.00.
      To teach a lesson to all users who rely on the dev-team.
      source: Fix Battery Drain After iPhone 3GS/3G Baseband 06.15.00 Unlock with UltraSn0w 1.2 | iPhoneHeat






      -------------------------------------------
      i need to back in my locked baseband (5.14), but no solution.
    1. pdiddy21502's Avatar
      pdiddy21502 -
      My iphone 3gs 06.15.00 baseband running 4.1 and i havent had a problem with my gps
    1. VIRUSCELL's Avatar
      VIRUSCELL -
      well cuz you are on 4.1 and i've been told that u'r gps works on 4.1 but i tried it still no gps working :S
    1. coolguy123123's Avatar
      coolguy123123 -
      Quote Originally Posted by VIRUSCELL View Post
      well cuz you are on 4.1 and i've been told that u'r gps works on 4.1 but i tried it still no gps working :S
      yea im on 4.2.1 and it sucks haha
    1. cheme75's Avatar
      cheme75 -
      when you have been provided with warnings and you still take the risk, it is because there is an overriding need to achieve a goal. In many of our cases, it is unlocking in order to actually use the device as it was intended, primarily a communication device - not a music player. If I wanted a music player with cool extra features, I'd have bought an ipod touch. But, I needed a phone I could use in another country and I had access to a 3gs. The 06.15 unlock came in the nick of time for me since it had previously been updated to 4.1 with 05.14, which I did not know at time of acquisition. So I am thankful the dev team came up with a solution, otherwise, I'd have an ipod I do not need and I'd be looking to spend even more money for a smartphone of some sort to get me by while I am traveling. So the 3gs has some bugs, but for the most part it works perfectly, especially for making phone calls. I lose 3g or gps or wifi once in a while it seems like when switching from one to the other at times. But, so far a simple reboot makes everything work normally again.

      Now to compare this with the economic failures of recent years is flawed. In the case of the financial markets, tools were devised to basically hide the risks... for example, no one ever packaged a mortgaged backed security and told investors "hey, there are huge risks, the mortgage holders behind this security are holding adjustable rate mortgages on over-priced homes and have a good chance of defaulting in 5 years when the rates increase because we didn't view their poor income ratio to be an issue." Surely this would have made some investors looking to be a little safer hold off and only those who really felt they could handle the risk to jump in.
    1. Icallea's Avatar
      Icallea -
      Is there a fix for the 3GS 4.2.1 GPS issue been posted yet?
    1. iForm's Avatar
      iForm -
      Quote Originally Posted by cheme75 View Post
      when you have been provided with warnings and you still take the risk
      you wrong !!
      when they published the solution of the bb 6.15 in the blog, the GPS warning was announced after 7 days past. is too late for all who have trusted the dev like me !
    1. Benny123's Avatar
      Benny123 -
      I have noticed better GPS on my 3G on 4.2.1, for what its worth. I used stock 4.2.1 with redsn0w and custom 4.2.1 (without BB). Detailed info on youtube. GPS is able to find my location often within a few hundred meters. It was terrible on 3.1.3, better on 4.1, and pretty good on 4.2.1 Still not perfect, and doesnt follow you every second...only updates every 30-60 seconds. But when it does, its close. I am wondering if a)On some level this BB, needs to be on a firmware the ipad actually had (ie 4.2.1) or b) Whether using a custom firmware with itunes (without a BB) helped the issue. I tried 3.1.3 and 4.1 stock ipsws, but they may be conflicting because of the BB.
    1. cheme75's Avatar
      cheme75 -
      Quote Originally Posted by iForm View Post
      you wrong !!
      when they published the solution of the bb 6.15 in the blog, the GPS warning was announced after 7 days past. is too late for all who have trusted the dev like me !
      you're right about the gps warnings... I needed a phone I could use anywhere - gps was last of my concerns at the time - just needed unlock. I see now the warnings were just about no coming back from 06.15.

      Maybe I am in the minority but I am thankful the dev-team came up with the unlock... making calls, sms and 3g are all I really need, my gps works fine too but I rarely use it.
    1. coolguy123123's Avatar
      coolguy123123 -
      Any word yet? I need gps on my iphone 3gs with tmobile!!!
    1. iForm's Avatar
      iForm -
      the solution after 4.3 release is out (on feb 28th) ??
    1. iphoneloverlover's Avatar
      iphoneloverlover -
      It is not Ultrasn0w

      I know because I have lost GPS functionality on 06.15.00 and I never needed to install ultrasn0w as I didn't require a carrier unlock (officially unlocked).

      I did manage to get GPS back on my iPhone 3GS 4.1 after I did these steps:

      [ame=http://www.youtube.com/watch?v=pwmK1XNB9Es]YouTube - iPhone 3GS GPS Fix (06.15.00 Problem) Workaround [Read Description First][/ame]
    1. coolguy123123's Avatar
      coolguy123123 -
      wait so now i gotta buy something?
    1. jdm.accord's Avatar
      jdm.accord -
      Quote Originally Posted by coolguy123123 View Post
      wait so now i gotta buy something?
      No. He's a worthless spammer.
    1. Sliyk22's Avatar
      Sliyk22 -
      no fix to this still?
    1. Simon's Avatar
      Simon -
      Nope, not yet
    1. Sliyk22's Avatar
      Sliyk22 -
      Quote Originally Posted by x98car View Post
      Nope, not yet
      Any chance that updating to 4.3 may fix this?
      I miss my gps
    1. Simon's Avatar
      Simon -
      nope, it wont fix it. 4.3 baseband is still lower than 6.15 so the baseband wont change.