Blacksn0w unlock worked but when lose signal it does not pick network back up

[scott7611]

Hi,

I have a 16GB 3GS and it is running FW Version 3.1.2, which I have jailbroke and unlocked using geohots latest blackra1n and blacksn0w so I can use my Orange sim card (in UK).

All is fine on the surface, wifi working and when i put my sim card in I get signal and can text, phone, etc. However, when I go in to a poor signal area and lose service and then go back in to a good service area my iPhone does not connect back to Orange.

The only way around this I have found is to remove the sim, put it in my old phone let it connect to network and then remove and replace in iPhone.

I have tried reinstalling a few times and still the same, this also happened when I unlocked previously with ultrasnow (iphone locked up when doing a reset which is why i ended up having to go to 3.1.2).

I can recreate losing signal by switching airplane mode on and then back off, after doing this it also is does not pick the network back up.

Any help would be appreciated as its killing me having this great bit of kit and not being able to take it out....well not without carrying my other phone and a paperclip

[DeL1873]

i have a simular problem im on o2 uk official carrier my handset is pay and go but i use my o2 contract sim in it as blacksn0w came out yest i decided to upgrade to the 3.12 firmware and while i was i thought may aswell unlock it aswell after unlocking the dam thing i lose my wifi all the time and my signal is constantly at 1-2 bars and then loses reception all togother and i get the no service and the phone does not connect back to the network

[iphonedummie]

Hi,

I have a 16GB 3GS and it is running FW Version 3.1.2, which I have jailbroke and unlocked using geohots latest blackra1n and blacksn0w so I can use my Orange sim card (in UK).

All is fine on the surface, wifi working and when i put my sim card in I get signal and can text, phone, etc. However, when I go in to a poor signal area and lose service and then go back in to a good service area my iPhone does not connect back to Orange.

The only way around this I have found is to remove the sim, put it in my old phone let it connect to network and then remove and replace in iPhone.

I have tried reinstalling a few times and still the same, this also happened when I unlocked previously with ultrasnow (iphone locked up when doing a reset which is why i ended up having to go to 3.1.2).

I can recreate losing signal by switching airplane mode on and then back off, after doing this it also is does not pick the network back up.

Any help would be appreciated as its killing me having this great bit of kit and not being able to take it out....well not without carrying my other phone and a paperclip

go to general then reset setting then click on reset network and everything should be fine

[scott7611]

have tried doing the network reset and its just the same, still won't find network once signal has been lost but thanks for the advice.

Anybody else have any other ideas?

[Poseidon79]

Restore and start all over.

[kirkie1]

Just a thought,I had this problem a while ago with my vodafone sim card,it turned out I needed an updated sim card that was programmed for 3G try calling orange and tell them your sim card is faulty,my sim was over 3 years old,hope this helps.

[scott7611]

My sim card is definitely a 3G sim card but I might get it changed just to try.

I have also tried restore adn redo blackra1n/backsn0w a few times and still the same, might try it a couple more times as the first time i tried wifi was missing but second time it was there.

Have also tried resetting and when it asks for the sim card I put my Orange sim in it, on another thread someone mentioned that they might be recognising orange sims now.....it didn't, told me to put an official carrier sim or the one out the box in. Had to put a spare o2 payg sim in to get it off that register screen.

[pratt1503]

i had this problem with Ultrasn0w, and the only way round it that i found was to set up as a new phone rather than back up from previous.

give it a go you never know

[scott7611]

i have tried resetting and setting up as a new phone before, but will give another try now and report back

LATEST UPDATE:

So have tried soft resetting - resetting on iphone (blackra1n was still installed after), reinstalled blacksn0w and still same issue.

Plugged in to itunes, done a full reset, etc and set up as a new phone (not restored). Then reinstalled blackrain and blacksn0w and still the same.....works until i lose signal and never connects back up.

Have tried doing various network resets, putting an orange sim in to activate phone (didn't work and had to use o2 sim).....thinking of giving up and just using it as a touch

[rashers52]

i have same phone 3G 16GB , and same problem.

i left home to go work with full signal (orange). in work where reception is bad i loose signal and it never regains. i also swap sim to another phone then put back into iphone and i have full signal .. very strange , im going to go up to orange shop weekend and see if they can shine some light onto the matter.

[scott7611]

great, if you can let us know what they said....although I am not holding out much hope

[scott7611]

I have given up for now, I'll keep an eye on this thread to see if anyone has any other ideas that I can try.

Looks like i'll be getting an official orange one when they are out!!!

[rashers52]

Went to orange shop just , the guy was useless. He said it's prolly due to the unlock. I think once orange bring out their iPhone maybe the problem will stop.. Fingers crossed. Keep an eye on this thread

[zYxMa]

Me and my friend are having issues with GSM/UMTS signal looses, but the difference is that we have full reception in our areas.

Intermittently looses signal for about 5 seconds. Sometimes when some1 calls me, then I can only hear one ring and I am not able to answer a call and sometimes it looses signal for no apparent reason whilst playing with iphone.

We both have 3GS from o2uk. We are using it in t-mobile uk now.

What is strange, my friend also has 3G and when he bought new 3GS he restored the 3G to the previous state with factory o2 simlock, because it works in o2 now and even though it looses signal intermittently as well.

What I did just now, I switched 3G off in iphone and it lost signal for about 5-10 seconds. I will use my iphone with no 3G for some time, will see if it happens again.

[codvisp]

Greets to all,
Well seems that i'm encountering the same problem as you scott7611 and many others... I have an iPhone 3G updated to the latest version in itunes (firmware 3.1.2 and baseband 05.11.07)and Flashed by "blackra1n RC3". Well my iPhone got jailbreaked but even after using "sn0w", my line opens for a minute or two (full bars)then i receive many of these errors: "No Sim", "Sim Failure", "No Network" or "Service Error".....
Hope a solution will be found soon enough... I've been searching for 3 straight days now and i'll continue to do just that. So, in case of any luck You'll be the first to know!
Keep the community ALIVE!

[pontiac428]

same problem here. US AT&T 3G iPhone, clean install 3.1.2 -> blackra1n -> blacksn0w, trying 02 Deutschland SIM w/3G and getting "no service". many hours reading, frustrated.

[dcnet]

I got the same problems.

Did a clean install of 3.1.2, then used Pwnage to jailbreak blacksn0w to unlock. Worked fine for the first day or so. After that the wifi bars started to decrease.

Decided to try another time to see if using blackra1n & blacksn0w would improver things. It did not help. At this point that I can no longer get connected to any network.

Afraid of trying it all over again because without wifi I will not be able to install cydia and get blacksn0w.

Has anyone found something that works?

[sandford]

I have nearly exactly the same problems.... i am running an iphone 3G - 3.1.2 on basband 05.11.07 on a "three" network sim. i'm on a pay monthly plan and as my internet + unlimited download was free putting the sim in an iphone 3G seemed a pretty good idea - even though i found no sign of anyone doing anything similar in the UK! anyway, i unlocked using blackra1n and then blacksn0w, successful unlock, however.... i found that i could use wifi etc no problem, but the iphone would recognise i was on the network three and wouldnt give me any signal.... i eventually went to a large town, and just by coincidence tried taking the sim out and putting it back in, and as i was in a 3G area, it gave me full 3G and 2G coverage to make calls, use web, etc... but soon as i leave 3G area i loose all my signal including 2G - voice calls, mms, etc. and I also have the same problem as everyone - even if the signal loss is temporary, i loose my 2G signal permanently, however - my 3G will come back and be usable!!?? its ridiculous having to carry my nokia around with me to use wherever i can not get 3G reliably - as i live in Somerset - and only large towns have 3G! so if anyone has any ideas (new ones) i would really appreciate the help as would most people on this forum i think! i've spent the last week of evenings searching for an answer...my only suspicions after much research, is that the bootloader maybe causing issues.... but i dont know why! hope this can in someway help someone who is good with iphone software to work something out!

[jerry305]

Hello everybody, I'm having the same problem ... my 3gs loses the signal completely for a couple of seconds then it comes back ... the problem is that it happens when I need it the most!!! Please post solution if anybody gets one. Apple is really working hard on keeping us out.

[i-bry]

3.1.2 on basband 05.11.07 on a "three" network sim UK.

I unlocked my iphone when geohots blackra1in first came out. It worked great. I got full (5 bars) strength all the time. I was so pleased that i even bought another iphone which someone had try to unlock but had failed.
I installed a fresh 3.1.2 firmware and used blackra1n and it worked, even though the person i bought the phone from had tried this.

Thing is both phones did not work with an 02 sim card i had, but as soon aas i put my 3 sim in they pulled in the siginal. I then tried using a vodafone sim, but this would not work either. But i was not bothered because i only wanted to use it on the 3 network in the UK.

Since this time my phone worked everyday until fri 13th when i turned on my phone and it would not get a siginal. I tried the other phone which i unlocked the previous week but had not used and the bars went to full for a split second then they gone also. Both phones unlocked on a fresh 3.1.2 install with the same baseboard stopped working as soon as i put my sim in.

I thought that mabe my phone(s) were both blacklisted as the 02 & vodafone sims would not work after the initial unlock and that the blacklist had not reached 3 yet. But after checking my IMEI on 2 IMEI sites they say that its currently not blacklisted.

AMTA main

Track IMEI

I have reinstalled the jailbreak and unlock using various combinations, i even took my phone apart to check if anything was loose. Checked sim contacts etc.. you name it i have done it.


I have 2 theorys for what possibly could be happening:-

1) Apple have been able to alter the 3.1.2 code when you restore which has broke blacksn0w's back when you use it. (they have done this silently which may be against some EULA, but they have been taken to court over this kind of thing in the past)..so very possible.

2)3, vodafone, 02 must have some agreement over allowing unlocked iphones on their network although i have read on a vodafone forum from a vodafone rep that this is not the case' no cloak and dagger stuff going on here' she said.

So, i dunno what wrong. The iphone seems to be plagued with NO Siginal issues since its release and there are loads of fixes for this, but not for this particular one.

I think we need a new unlock. Blackra1in is not able to fix this problem.

Any ideas.............