[Q] How does unlocking a phone by IMEI work nowadays? - General Questions and Answers

There use to be free unlocking calculators for the old phone models. But it seems that it's impossible to unlock a modern phone for free. What I don't understand is how it works nowadays. You have to send the IMEI to a reseller, then wait for days (1 to 5) to get your code back.
I thought that smart hackers were profiting from their own unlocking calculators, created by themselves, but it seems that the delay getting the code is because some databases have to be accessed. And depending of the company that locked the phone that could be harder and more expensive to do.
So, how does it really work? Who are the original sellers and unlocking code creators?
Thanks!

Wish I could help.I'm also having to wait for my unlock code tio be sent.all I did was call up t mobile and asked about unlocking.have them the imei.they sent it to samsung and now I'm waiting for the code for my vibrant.it was all free.
Sent from my SGH-T959 using XDA App

saw01 said:
Wish I could help.I'm also having to wait for my unlock code tio be sent.all I did was call up t mobile and asked about unlocking.have them the imei.they sent it to samsung and now I'm waiting for the code for my vibrant.it was all free.
Sent from my SGH-T959 using XDA App
Click to expand...
Click to collapse
What do you mean "they sent it to Samsumg"? Is there a way to cheat companies to unlock their own phones?

Phones are simlocked to inibith usage of other sim cards different from the one of the operator that gave you the phone: on this we all agree BUT in all the countries it's possible to unlock the mobile after a definied time, in italy for example is 9 months under payment and 18 months for free after purchase just going to your operator: many people don't know this really simple mechanism.
Here is the function of giving them your IMEI code: the algoritmh, specific for every operator, use your IMEI to calculate a number that must be the same that is written inside your phone: that's why they ask for IMEI and OPERATOR

the.rider1290 said:
Phones are simlocked to inibith usage of other sim cards different from the one of the operator that gave you the phone: on this we all agree BUT in all the countries it's possible to unlock the mobile after a definied time, in italy for example is 9 months under payment and 18 months for free after purchase just going to your operator: many people don't know this really simple mechanism.
Here is the function of giving them your IMEI code: the algoritmh, specific for every operator, use your IMEI to calculate a number that must be the same that is written inside your phone: that's why they ask for IMEI and OPERATOR
Click to expand...
Click to collapse
But is the algorithm really known or do unlockers get the unlock codes using insiders that work for the operator company? So this workers would illegally pick code by code from some database since they have to have the unlock codes in order give them for free after X months anyway.

Think they just use software generators.... nowadays also Windows versions and software that costs millions went leaked...

the.rider1290 said:
Phones are simlocked to inibith usage of other sim cards different from the one of the operator that gave you the phone: on this we all agree BUT in all the countries it's possible to unlock the mobile after a definied time, in italy for example is 9 months under payment and 18 months for free after purchase just going to your operator: many people don't know this really simple mechanism.
Here is the function of giving them your IMEI code: the algoritmh, specific for every operator, use your IMEI to calculate a number that must be the same that is written inside your phone: that's why they ask for IMEI and OPERATOR
Click to expand...
Click to collapse
but basicly if someone would manage to flash his IMEI with other from completely different phone he no longer uses would it do the job?

I had the same problem with my old Samsung Jet, they wanted me to send it to them over a 30 day period costing me £25!

If you get the paid unlock code means the code provider get the Code from the particular Network Data base,...so it's Legal one...Then in free code generator the calculators generate the code,but the code generate by the program so it generate default codes.....I got the code for Unlocking the Phone from Network lock quickly and free of cost,i got the correct free Unlock code for my Nokia,Samsung Phones at here www.unlock-free.com and Unlock it........

I believe the reason that calculators are no longer possible is due to the fact that the manufacturer/provide uses random algorithms to generate the unlock codes, and are not based on the IMEI. That is, the unlock code can only be found in their database as they did not use the IMEI as part of the algorithm to generate the code in the first place; hence there is no way to reverse engineer them for newer/more common devices.

shmootz said:
I believe the reason that calculators are no longer possible is due to the fact that the manufacturer/provide uses random algorithms to generate the unlock codes, and are not based on the IMEI. That is, the unlock code can only be found in their database as they did not use the IMEI as part of the algorithm to generate the code in the first place; hence there is no way to reverse engineer them for newer/more common devices.
Click to expand...
Click to collapse
False. If this was true, then any hacker... anyone could do this. All unlock codes are based on your IMEI and phone model (carrier,country,etc).

Any one please help me. I have Asus Garminfone A50 locked by T-Mobile now I would like to unlock to use any sim card. IMEI:357355039003527 please help me or send unlock code to my e-mailroject[email protected]
Thank you

hkimsiv said:
Any one please help me. I have Asus Garminfone A50 locked by T-Mobile now I would like to unlock to use any sim card. IMEI:357355039003527 please help me or send unlock code to my e-mail[email protected]
Thank you
Click to expand...
Click to collapse
Believe me, it's not as easy at it seems to get SIM unlock codes. Your best bet is to find either a trustworthy site online, or call your provider and tell them you're travelling internationally and you need to change SIM cards... they may charge you but it only needs to be done once. However, if you have patience eventually someone will write an app to do it for free. But that could take months, even years. I'm currently trying to figure out a way to unlock mine without doing either of the methods outlined above and I've spent days researching this and I still am not much closer...
-AC

Try here: http://forum.gsmhosting.com/vbb/f88/

well this is my understanding the unlock code database will be having 2 primary keys 1 will be the IMEI number and another one is the key which will be used for generating the unlock code which is unknown to the outside world.
so when some one request for the unlock code the service provider, (either the phone company or thirdparty) have to refer thru this 2nd key for generating the key but since the key generation is done from the manufacture end the database is acting like a blackbox.
-cheers

just get your imei off the web to save you from millions of copies that are likely coming up

hello, some time before I digged into SONY unlock, my conclusion is that it's impossible to brute force or you really need an insider in that company.
// STEP:
// t = NCK + SALT
// h = sha256(t)
// 9.times { h = sha256(h) }
// assert(h == HASH)
// IMEI: 353588050129**7
// NCK : 647765421762**43
SALT and HASH are programmed in trim area, and don't know how to calculate those two, only way is to get the phone and extract them.

I always thought that codes were pre calculated when phones are manufacturered.
I know for some phones the ROOT AWAY app (on samsungs) takes off the sim lock.

@tewilove, your finding is sony-specific or docomo-specific? As you know the same Sony models is sold in Japan by a different operators - Docomo, Softbank and KDDI. But always with a sim lock.
With root we could read the whole TA, so we could calculate unlocking code? What do you think?

shmootz said:
I believe the reason that calculators are no longer possible is due to the fact that the manufacturer/provide uses random algorithms to generate the unlock codes, and are not based on the IMEI. That is, the unlock code can only be found in their database as they did not use the IMEI as part of the algorithm to generate the code in the first place; hence there is no way to reverse engineer them for newer/more common devices.
Click to expand...
Click to collapse
If they don't use the IMEI, then why do the unlockers ask for it? There should be no need for it if that was the case, unless, it's just to verify your phone model or something?

Related

spv e650 unlock possible?

been offered a free upgrade to this handset wondering it if is easily unlocked
kanjer said:
been offered a free upgrade to this handset wondering it if is easily unlocked
Click to expand...
Click to collapse
sim or app unlocking ?
for sim unlocking, two unlocking options:
1. Get code from Orange. think this is £20
2. Pay imei-check to do
no other methods at present
for app unlocking, follow my post under monet/virgin lobster
spv-e650 sim unlcok
as far as i know for now imei-check cant do it and the only way for now is via orange
Yes they do now
From MSMobiles:
http://msmobiles.com/news.php/6352.html
motin said:
as far as i know for now imei-check cant do it and the only way for now is via orange
Click to expand...
Click to collapse
Hi there,
Unlock any HTC by code or software within 24 hours www.mobilefixed.com fastest online turnaround time drop me a PM for a discount
E650 Orange unlock cost
sahaya said:
hi there are many ways to unlock the
mobile we can use software ,cable ,codes etc.... among
them codes are the best .nowadays there are many online sites found that provide
the codes to unlock the mobile.you can get the codes from here theunlockspot here they ask
the following details they are mobile model,country and the network which locks your mobile ,imei
number of the mobile .finally they will send the codes to unlock the mobile.
Click to expand...
Click to collapse
Is it really worth it?
TIME:2 to 4 Working Days COST: £ 37.67 British Pounds
There are several locks on a device:
Application lock - this prevents that unsigned programs are run on from the operating system. This can be worked around and finally removed, but it seems peculiar for the Orange devices. You will usually need this for the subsequent items.
CID Lock - this prevents that only the firmware of the dedicated device can be loaded. Despite same HW, the SW of another device will not load. There are ways to work around this at no cost (keyword USPL or JumpSPL).
SIM Lock - this prevents that a SIM card of another operator can be used in the device. This cannot be worked around for the Vox, you need an "unlock service".
First try the original operator to provide you with that - you just get a code matching your IMEI.
Contact jockyw2001 in the related thread to supply an unlock code. The thread is this: http://forum.xda-developers.com/showthread.php?t=355790. I think he also charges some minor amount - no clue how much, but less than pay-sites.
Cheapest pay site I found is http://www.imei-check.co.uk/e650_unlock.php. Have bought from them as well one time and this was very fast and smooth. You may get a free CID unlock automatically if I remember right - ask them.
Mind that the thread-pusher (sahaya) just uses his post for advertising the expensive service. I have seen the identical post in several forums.
Hi !!
If you need to get it SIM Unlocked...contact "Jockey"...you will find him in the forums.....he will give you a reasonable offer ( a reasonable price) to SIM Unlock your VOX.....I got it unlocked from Him.
Regards
kanjer said:
been offered a free upgrade to this handset wondering it if is easily unlocked
Click to expand...
Click to collapse
Yes.It's possible to unlock your mobile using the codes.I found an unlocking service for your mobile from mobile-unlocker.com .Once you get the code, you may follow the instructions at h mobileunlockguide.com This will help you to unlock your mobile easily.

General Question About IMEI Unlocking

I have always wondered, with all these services for unlocking phones via IMEI, how does this generally work. I mean, sure we know the carriers have either the codes or the specific algorithms used to obtain the codes by IMEI. However, how to all these services get their hands on either? Also, if they are so easily obtained (judging by the number of services claiming the ability to unlock phones), why is it so hard for an average person to obtain one without paying a service to do it? Are they only sold/obtained in batches of IMEI's, perhaps being prohibitively expensive for one person? If the algorithims used are known, which they must be by someone other than the carriers, then why can't someone just write software to accomplish the task? Say some opensource developers. I know there are plenty of those who would give such software away free if possible.
Some things I have always wondered about IMEI unlocking. Basically, how can all these services to it, but a person cannot?
Moving to Q&A area.
Thats the question that has me somehow frustrated the last days! Specially since I moved to Blackberry, which is like very dumb plat, I cant believe that kind of basic hacking is so much underwraps.
Hai i will help You,You cannot i mean a normal person cannot get the unlock code,It's based on the Network Database and network provider only generate the code based on Mobile Phone IMEI Number and Model...So they have code in their Data base,they can't guess by others,so you need to pay for it..Nowadays some persons have develop some calculators and programs and to generate a default code based on IMEI,But it will not work always,so payable cost is best for PDA phones for Normal Nokia DCt Phones and other old phones free code is useful...Others cannot generate the unlock code default method..It's too hard,Here Unlocking4free.com/unlock-your-phone you can get the unlock code for some mobile phones at free of cost and unlock it.

Just got tired of waiting a solution for sim unlock my D2G

that's it I just got tired of waiting a solution for sim unlock my D2G, so ...
any of you, D2G owners, US citizen with a VZ contract, is interested in exchange your previously sim unlocked D2G with mine?
mine is blue, zero scratches, and no dust at all anywhere (it has been keept stored in the box most of the time).. ESN clean off course (i'll give you my IMEI so you can check with VZ)
the idea would be to send you mine (without battery and SD card and factory reseted off course)... I pay the shipping... you receive mine, and send yours to me (same conditions off course) .. yeah I pay that shipping too ...
so you get a mint one, and I receive yours sim unlocked... don't care at all about color.. and even I'm open to receive a phone with some usage marks... this is not scam, I'm just a guy tired of waiting to make his phone work ..
regards
Victor
Solution is easy
For me solution was easy. I pain 19 PLN (about $6,60) for an unlock code. I;m using my D2G in Poland and it works great.
Obviously the unlock codes sold on the 'net didn't work for walderrama; so I'm not sure why are you sharing your positive experience with that here, Gibol666.
yeah indeed I've payed 4 times for codes that didn't worked (actually each seller promised that their codes will work as charm, but all 4 gave me the same codes)
well, I see that there's not enough "interest" in help me ... but what about if I add USD $50.- to this "favor"... I'll send it trough paypal as soon as I get the tracking number of the shipping .
regards
try this site, it helped me
TheUnlockShack.com
Dear Customer,
Order ID: 3473673
Your Unlock Code for your Motorola, A956, IMEI: 355494042093571 Locked to: Verizon is:
355494042093571 OR 88339151 OR 33248343
For instructions on how to enter your code, please visit the following page:
http://www.TheUnlockShack.com/instructions.php
Note: If you have recieved more than one code this is because some handsets
have multiple levels of lock for network, service provider, sim etc.
(These locks are usually inactive and you don't need to worry about them)
The code most likely to be your network unlock code is listed first.
Best Regards,
www.TheUnlockShack.com
first code 88339151 work to my D2G phone
VIPER_GE said:
try this site, it helped me
TheUnlockShack.com
Dear Customer,
Order ID: 3473673
Your Unlock Code for your Motorola, A956, IMEI: 355494042093571 Locked to: Verizon is:
355494042093571 OR 88339151 OR 33248343
For instructions on how to enter your code, please visit the following page:
http://www.TheUnlockShack.com/instructions.php
Note: If you have recieved more than one code this is because some handsets
have multiple levels of lock for network, service provider, sim etc.
(These locks are usually inactive and you don't need to worry about them)
The code most likely to be your network unlock code is listed first.
Best Regards,
www.TheUnlockShack.com
first code 88339151 work to my D2G phone
Click to expand...
Click to collapse
You can only unlock a phone that hasn't had unlock code altered by Verizon. With D2G it is a hit or miss. Some unlock (like mine), others do not.
All online unlockers gather their database from Motorola. Hence providing same codes. For "altered" phones, only Verizon can give you the right code. Unfortunately...

myth about chinese method of unlocking the D2G

So, like many of you guys, i bought an D2G from ebay this morning. My phone has not arrived yet but i assume its prob locked by verizon. i took the initiation of seeking how to unlock it, and i landed here. After searching tons of thread with the same topic? i will summarize the major two methods of unlocking the device, so later on, people like me with the same problem doesn't have to. (please correct me if i am wrong)
1. unlock code from VZ or vendor (unlock shack seems to provide refunds, so one might wanna give it a try.)
2. turbo sim (i used it for iphone4 and it works, but i cant say the same with d2g.)
couple members mentions some dude in china works out a method but you will have to send the phone in. it just happens to be that i speaks chinese, so i went over to the china great firewall in attempt to search for an answer. Apparently the method is no secret. The chinese said that this unlocking method is done through software and worked the same as the unlock code by verizon. The only difference is after the unlock process, the IMEI of your phone will turn into a 16 digits number starting with 0000. I got class in a lil bit, so this is my search so far. i will keep you all updated with my process. if i find a solution. i will make a tut for yall.
IMO changing the imei number isn't a solution at all. Thanks for info.
Changing imei isn't the solution but rather the outcome of the software unlock, but many said the unlock code doesn't work. I would assume many would prefer a better solution which promise certainty, especially when it's a paid service.
Why bother with esothic methods when you can unlock the phone with an online service and 10$ ?
The Solutor said:
Why bother with esothic methods when you can unlock the phone with an online service and 10$ ?
Click to expand...
Click to collapse
Unfortunately - not always. Some are "tough nuts" and only Verizon can unlock them. And probably those Chinese guys..
IMEI must be 15 digit though, not 16. I only see problem if they use same IMEI for everyone. Two phones with one IMEI on one network is a call for trouble..
For the record - chaning IMEI number of a GSM phone is illegal in most countries.
leobg said:
Unfortunately - not always. Some are "tough nuts" and only Verizon can unlock them. And probably those Chinese guys..
IMEI must be 15 digit though, not 16. I only see problem if they use same IMEI for everyone. Two phones with one IMEI on one network is a call for trouble..
For the record - chaning IMEI number of a GSM phone is illegal in most countries.
Click to expand...
Click to collapse
Apparently, the method switch the original imei 35xxxxxxxxxxxxx of d2g to 0000xxxxxxxxxxx but digits after 0000 are not identical, from there they can calculate the pin code and is available for free. And as i read more, the chinese change esn for the cdma to work. Even thou changing imei or esn is illegal, i doubt they really regulate such act lol. And chill out on the negativity, a thriving forum are great only if their member share their knowledge and benefit us all. My last phone was Nokia n900, and the phone are still popular today due to the community's contributions:
No negativity here. I will be glad if all those having problems unlocking their phone finally find a way to sort their unlock issue.
Discussions about modifying IMEI/ESN is not allowed here on XDA (as well as most other similar forums) hence I expressed this concern.
leobg said:
Unfortunately - not always.
Click to expand...
Click to collapse
I know.
But I still think that any alternative method should be taken in account only if you are one of those unlucky owners, not when the phone is still on its way...

[Q] Need Quick Answer Sim Unlock

I am about to buy an unwanted contract upgrade Z3 but it is locked to another network. If I unlock it would this mean the bootloader is unlocked or not?
I do not want to loose the DRM protected camera features and the sellers network is refusing to give him the unlock code until he has had the phone for 6 (!) months.
The SIM unlock code will not touch the bootloader so your DRM keys will still be intact.
fl4r3 said:
The SIM unlock code will not touch the bootloader so your DRM keys will still be intact.
Click to expand...
Click to collapse
And using one of the paid unlock code services online is possible with the Z3?
I was under the impression that newer phones could not be unlocked this way and had to be rooted.
Root has nothing to do with SIM lock.
Usually the code works the same way whether it is obtained from the operator or a separate online service. However there is normally a delay from when the device is released and when unlock codes from online services become available. So I cannot say if they have them available for the Z3 yet.
As long as you use one of the reputable online services you should be fine as they will only advertise it if it is available.
I was under the impression that newer phones could not be unlocked this way and had to be rooted.
Click to expand...
Click to collapse
You can use SIM unlock codes on network locked phones straight from the shop - so no rooting or anything needs to be involved. You just insert a different SIM, then an option should come up to insert the SIM unlock code.
It gets more difficult to find exploits for rooting newer phones without unlocking the bootloader. But that is a separate issue.
Hope that helps.
You are confusing two different things.
If your phone is SIM locked, you'll only be able to use it under whatever company's network it is locked to. It doesn't make a difference whether it's rooted or not or whether the bootloader is unlocked or not.
You can probably unlock the SIM lock through a paid service (IMEI unlocking) although with newer phones is a little harder to find a service that will do it.
Look at several unlocking services (there are many online) to see if they can unlock that phone before you make the purchase.
Brilliant. Thanks for the help!
Anyone care to recommend a good online service to use?
The carrier will do it for free usually. Find someone who currently has a subscription
They said it would be 21 days before they would release the code for some reason. I've used a paid online service although even they ae saying 7 days.
finty said:
They said it would be 21 days before they would release the code for some reason. I've used a paid online service although even they ae saying 7 days.
Click to expand...
Click to collapse
Real delivery time for Sony codes from 3rd party service is 3-7 days. These 3rd party unlock codes come from manufacturer (Sony) and they support all Sony models. No matter if the model is just released etc. If you are using good supplier with history and your phone has at least 2 attempts left to type unlock code (is not hard locked) it's very safe process. Good luck.
Not asking for code
I have a brand new Z3 locked to T-Mobile.
When I insert my own sim, it does'nt ask for unlock code. It also says at the top of the notification bar that the phone is network locked and I can only make emergency calls.
Can you please help me on how to get the phone to ask for an unlock code so that I can enter one and unlock the phone.
Thank you.
Device unlock apk.
Do you have that in your app drawer?.
If you don't go look in the mods n apps section I just posted a link to the app you need. There is no way to make the t-mobile D6616 ask for an unlock code. At least no way I found. T-mobile r jerks.
Edit
Here's the link
https://drive.google.com/file/d/0BwEKM70ewjHNQ01UWlNmRXJGbkE/view?usp=docslist_api
Sent from my D6616 using XDA Free mobile app
Dear imprezif,
I have the app and tried getting an unlock done through it. I get the message this device is not eligible for unlock, contact T-Mobile for device unlock eligibility.
You are right about T-Mobile though!
Thank you for your response and I will keep trying...
Work this app on z3 compact? ther is something like that for z3 compact? thanks for help...

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