Baseband downgrade from 4.11.08 to 4.10.01 via chip replacement is now possible on iPhone 4.
My team and I would like to present sort of a good news for those who are currently stuck on baseband 4.11.08 as we managed to downgrade an iPhone 4′s baseband from 4.11.08 to 4.10.01 earlier today on 22 October, 2011.
However, It’s still not now possible to downgrade to 1.59.00 to make it unlockable with ultrasn0w. We have tried this numerous times even before Gevey Turbo SIM was released.
It’s similar to our baseband chip replacement service for 3G and 3GS, but this method requires two different chips to be replaced – the Infineon X-GOLD 618 processor chip and the Intel/Numonyx 128MB NOR DDR chip.
Once your iPhone 4 baseband has been downgraded to 4.10.01, you can then unlock it with a Turbo SIM.
There are a few tiny setbacks with this method – your iPhone serial number and IMEI will change. That means you can only hacktivate (activate) it with redsn0w or use custom hacktivated firmware in order to do a full restore. However, it is still possible to use original firmware to restore your iPhone 4 if you ever need to; unlike iPhone 3G/3GS on baseband 6.15.00 which doesn’t allow you to restore at all.
We are currently doing extensive testing and planning to launch this service very soon have launched this service. Customers who get their baseband downgraded using this service with us will also be getting a FREE Gevey Blue Turbo SIM worth $44.95. If you have the tools and skills to replace them youself, purchase the chips here.
Click here to read more about this service on our online store
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so wait how do we take part in this? also is there any risks we should know of?
come back often, when it's ready I will update this post, the drawbacks have been mentioned above
Wooo you are the MAN!
hard work from my team of dedicated people
So like the 3gs downgrade service offered before, it's going to be ~$60 for chip, $20 for labor and $10 for standard shipping?
haven't finalized on the pricing yet but should be similar… since there are 2 chips involved, the price will be slightly higher, and they come with warranty
Can’t wait to get this done!!
i got iphone 4 and im on ios 5.0 baseband is 04.11.08
please tell me in detail how can i downgrand it???
replace the baseband chip processor and the NOR chip as shown in the photo above
Whrn will this be available for me in india?
we plan to make it available worldwide soon
This is already available india in Delhi.. They just replace the chip and charge from aroung Rs3500 to Rs 6000.. Depending on the place..
Friend, I changed both baseband and NOR chips and baseband version still remains 4.11.08. I am 100% positive that donor motherboard had 4.10.01 on it. I tried it 3 times already with different motherboards and still no luck. After replacement baseband stays 4.11.08. What do I do wrong? Thanks in advance
Did you try to swap with another logic board instead of with the same one?
i have the same problem first i can downgreaded and i still but the baseband not change after 21.11. still the same 4.11.8 but befor this dat ican. som one helpe?!!!
this tutorial is no longer valid
how did you change it ? can you make a video on it or show me wich one to chang and how?
so we don't need to wait for dev team or gevey to update.
it's the only workable solution for now – the only one available on the web too
how does it work we ship the device to and you guys ship it back?
the process is similar to this http://www.beijingiphonerepair.com/baseband-chip/
Pingback: Downgrade iPhone 4 Baseband 4.11.08 to 4.10.01 - Unlock w/ Gevey Turbo SIM | BeijingiPhoneRepair.com
And about how much it would cost?
the latest information is on our online store
Where can I get those chips. Can I take from any other I4 which is dead now ?
possibly but there's an additional procedure that is programming both chips so that they can "talk" to each other
Ok question, how long is the turn around from the time I put my device in the mail until I get it back, second can we just buy the chips and do it ourselves and still get Turbo sim free? Or must we send you our phone or just the board? Is this service yet launched? Please advise, I have an iPhone 4 04.11.08 and I use tmobile.
the process is explained here http://www.beijingiphonerepair.com/baseband-chip/… we can't accept the whole phone, only logic board
at the moment we don't sell the chips yet
My phone now is dead after updating to IOS 5 , so is there a possibility to make it work again
how is it "dead"?
The Phone dosent connect to the carrier and thus no phone calls
if you\’re on baseband 4.11.08 there\’s no non physical hack that can unlock it
what should i do
wait for the unlock or replace the chips
if i have an old IPhone 3g can i use part of it , if no how could i order theis chip to activate the iphone
the chips are not compatible, so far none of the chips are available for purchase yet
so i have nothing to , just to wait only , is there any trials currently to unlock this IOS 5
none
FAKE!!!!!
can you prove that it\’s fake?
Great job guys! keep up the good work!
Will it ever be possible to unlock it without changing the baseband chip?
hopefully an updated Turbo SIM, or Dev Team?
I hope, because changing the baseband chip is too expensive for a student!
iPhone 4 is not expensive for a student?
am i correct in thinking you will send the board back with baseband downgraded to 4.10.01 & A free Gevey Blue Turbo SIM so the phone will then work on any network ???
Yes as explained above
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if you can down grade from 4.11.08 to 4.10… , why can not down grade from 4.11… back to 1.0. or 1. what can unclock by ultrasn0w ??? that the way you do that can reprogram of the both chips or replace new chips ?? if reprogram why can not down back to 1… version ??? Please , tell me more a bit ! thank you
the problem is there's no way to reprogram it to 1.59.00, a donor chip has to be used
yeah i have same question, and do guy sell baseband chip.
yes http://www.beijingiphonerepair.com/store/#ecwid:c…
is there anyway to reflash or verginize the bb chip X-GOLD 618, if no why? in my believe any electronic chip could be emptied via some way or special kit, have tried to get the full manual of the X-GOLD 618.
thx for ur hard work guys, u`r the best
thanks, hopefully we can find a way somehow soon
Some little question for you ,
Can you actually downgrade my own baseband chip and nor flash to 01.59.00 and not to install the new one?
I don't have a chip that has 1.59.00 at the moment
do you ship to Saipan Northern Marianas Island?
I had one customer from there before, should be no problem as long as it's just a logic board or anything that's not an iPhone
neither DHL, FedEx nor UPS want to deliver there!
do you have any videos or something for us to see how this thing works after changing the baseband chip…. i commend you guys for doing this thing but we also want to see something solid, you know what i mean. (hope i didnt offend you or anything.)
also what do you mean by this:
"Your iPhone's serial number and IMEI will change – this means you can only activate your iPhone using redsn0w or hacktivated custom firmware
You can restore to stock firmware without any issue but the point above (activating using redsn0w) still applies"
1. IMEI and serial are stored inside these chips
2. If you don't have the original IMEI and serial no, you won't be able to activate it via iTunes (with an official SIM card); most people would use redsn0w or custom firmware to activate it anyway
We'd like to make a video of it but really we're swamped at the moment!
greetings… how much will i be spending for the baseband chip replacement + shipping + labor? i'm from the philippines. will you send/ship the old baseband chips back to us, coz i really like to keep it, just in case…
http://www.beijingiphonerepair.com/hack/iphone-4-…
Hi i would like order processor chip & NOR, can you send UAE (Dubai) ???
any destinations worldwide
can i ship it from Brazil ?
im stuck in 4.11.08 using gevey sim , iphone is from usa
ty
only the logic board if possible
Do you stiil have the chip with 1.59.00 baseband??
sorry, not anymore
When are you gonna have it again??
i have a iphone 4 with a FAULTY BASEBAND CHIP( ERROR -1 IN ITUNES) can you replace chips for me
try using redsn0w and click on recovery fix first
do you guys gone restock 1.59.00 Baseband chip????
can\’t get them anymore at the moment
If u replace via chip iPhone 4. Just put back tomorrow and it is gone to works normally or what? After that just update to iOS 5 if I want to
you must always use custom firmware after that due to change of serial no and IMEI
When you guy gone restock the chip? because i want to buy one, if the Vold Miracle not coming out.
Are you sure that it will change our imei and serial number too?
Yes
Can u ship the chip to chennai(India)?
worldwide
How much cost?
Do you ship to india?
If no so plzz start shipping i realy need my phone working.
yes but we stopped this service for now
do you have any idea as for how much time will it take for the updated turbo sim to come for iphone modem firware 4.11.08
Hello sir..
when will these 2 chip available so we can buy it?
plzzzzzzz reply soon?
thanku..
Jan 2012
Hello, my iphone 4 has been stuck with basedband 4.11.08. What should i do? Do you have any solution? Hope you will reply soon. Thanks in advanced….
Hi
Can I send the logic board for chip replacement from Saudi Arabia..
Thanks
after i changed both baseband chip and nor flash.. now my iphone 4 can activated without needed att sim any more.. but still No Service and Searching..
can you show us how to change it in a video? and where can we order the replacement chip?
anything new from this thread? when can we order the BB chip?
Feb 2012, if there's still no unlock then
Guys! Need help for this problem. I accendentally updated my iphone 4 to OS5 which has a Baseband 4.11.08 which also not supported with Turbo SIM or Gevey SIM. Now this iphone 4 of mine was from US and AT&T Lock… i can’t use my iphone now coz of the Baseband updated to 4.11.08.
Guys! Need your help with this matter if there are any ways to downgrade the baseband.
Your full support is really apprecaited. Looking forward to hear your feedback back guys.
Thanks!
there's no possible method for now except replacing the chips, which will be resumed in Feb if there's no unlock then
Is possible if I just change baseband processor 337S3833 only?
No
oww i have 4g but its wifii option is vanished and imei is also vanished is some one have soluton so plz tell me…
Hai, I have iphone 4 ios 5.0.1 and modem firmware 04.11.8 it is an AT&T provider in USA. I want to unlock the sim.
I saw your earlier posts suggested to downgrade the firmware and unlock the sim. Is that still working that way?
Do you have any alternate solution? I'm from chennai (INDIA)
Thanks for your kind reply.
You mean changing the chip is the only method? or Downgrade the OS to 4.3.5.?
Your updates told that apple stopped signing in 4.3.5.
Hi. I want to avail your service. May i know if its still available. Because i saw from your store site, its out of stock. When will it be availble? Thank you very much.
As soon as we're done with the current batch, we'll accept orders again
hi i have a iphone 4 in blacklist report for lost and the imei is blocked whit this chips can i work again?
look my iphone 4 has a corrupted baseband and sais no wifi no baseband nno imei no nothing…if i change the baseband chip will those work again and how can i order one chip to ship in MACEDONIA????
it's not always that straight forward when it comes to this issue
Pingback: Downgrade iPhone 4 04.11.08 baseband to 04.10.01 or 1.59.00 baseband (Updated) | AiruLink
is this possible for 4.12.01? and how much? where can i get this?
Yes, http://goo.gl/PF1PA
what is the cost of this whole process….
Can you send me one for Brazil?
purchase from our online store
I have an iphone 4 USA with baseband update 4.12.01, would want downgrade to the baseband 4.10.01.. is it possible? must I replace the two chips? which the price for the two chips and the shipping in italy?
iam having iphone 4 iOS 5.0.1 and baseband 4.12.01…i cant unlock d phone atill!! is thr any way????
http://www.beijingiphonerepair.com/news/how-to-un…