Since last week an online forum has been excited by the fact that an untethered iPhone 4S has been successfully unlocked by a young Vietnamese man without using any equipment or tools.
Last year a Gevey SIM could be used to unlock an iPhone 4, but this year such a SIM cannot be used to unlock the iPhone 4S, which is secured by iOS5. In addition, jailbreaking, the process of removing the limitations imposed by Apple on devices running the iOS operating system through the use of custom kernels, has yet to be completed so that illicit software can be installed for use.
Such a situation has slowed the 4S iPhone market, since almost no traders dare to import the product for sale, although the potential profit is very lucrative.
But last week Le Minh Tuan, a Vietnamese university student in architect in Saint Petersburg, Russia, posted a simple method of unlocking an untethered iPhone 4S on Tinh Te, a science and technology forum at www.tinhte.vn under the username Fullove.
To unlock an untethered iPhone 4S, users must have a USB sim card reader, a magic sim (6 in 1), a local network sim card, and a sim produced by the Internet service provider that locks the phone, such as AT&T, T-Mobile, Telus, Bell or SFR, Tuan said.
He showed that the unlocking is carried out through four steps on his AT&T iPhone 4s:
Step 1: Plug the AT&T sim into the USB sim card reader using Magicsim v255 to back up ICCID, IMSI, and SMSC of the AT&T sim.
Step 2: Plug the local sim into the USB sim reader. In his case Tuan used a Beeline sim with Magicsim_v255 to get the parameters of the sim including ICCID, IMSI, SMSC and KI – the most important tool to clone a sim.
Step 3: Plug a magic sim (6 in 1) into the USB sim reader and record at location No. 1 the above ICCID, IMSI, SMSC and KI of the AT&T sim and record at location No. 2 the the Beeline sim’s ICCID, IMSI, SMSC and KI that have been taken from the USB sim card reader.
Step 4: Plug the magic sim (6 in 1) into the iPhone and carry out the process: settings -> phone -> sim Applications -> Switch Number where the user selects the Beeline sim -> main screen. The iphone will activate its search carrier and identify the Beeline network. The subsequent manipulations are illustrated in a video clip attached to Tuan’s posting on the forum’s website.
Tuan’s posting has stirred up the forum with tens of thousands of hits and comments, with many ny iPhone 4S users agree that this is a possible way to unlock an iPhone 4S in Vietnam to use it through the local Internet service providers.
However, The most difficult thing to do is to search for the KI using a local SIM, since SIMs of the latest versions have been secured by COMP-2 instead of KI, as in several years ago. Therefore, the search for KI using a USB SIM card reader will be very hard, even impossible.
A member of Tinhte confirmed that Tuan’s unlocking method helped that member unlock an iPhone 4S using a SIM card from 2005.
However, the fact that an iPhone 4S can be unlocked only with SIMs of older versions made it hard for most users to unlock their phones. Minh Hoang, another member of the forum, said, “How can I have a SIM card produced in 2005 or older search for KI?”
On the other hand, Le Hoang Tung, who is in charge of technical issues at VinaPhone, said KI is a system code that is not allowed to be disclosed for confidentiality purposes.
Tran Thinh, from the technical department of military-run Viettel group said, said, “KI is a password that is not provided to anyone. Viettel SIMs are now secured by COMP128V2 with high confidential ability, and if users try to search for KI, their SIM cards may be ruined.”
Tien Duong, who is in charge of iPhone unlocking services at a phone company in Hanoi, said, “The method of unlocking introduced on Tinhte is right, but it is not highly feasible, since Internet service providers in Vietnam have strengthened security ability for their SIM cards following the many cases of SIM hacking that have happened.
It is too early to conclude whether Tuan’s unlocking method is really feasible or not, but after it was introduced online, the selling price of the untethered iPhone 4S has increased by 20 percent on the market.
Last year a Gevey SIM could be used to unlock an iPhone 4, but this year such a SIM cannot be used to unlock the iPhone 4S, which is secured by iOS5. In addition, jailbreaking, the process of removing the limitations imposed by Apple on devices running the iOS operating system through the use of custom kernels, has yet to be completed so that illicit software can be installed for use.
Such a situation has slowed the 4S iPhone market, since almost no traders dare to import the product for sale, although the potential profit is very lucrative.
But last week Le Minh Tuan, a Vietnamese university student in architect in Saint Petersburg, Russia, posted a simple method of unlocking an untethered iPhone 4S on Tinh Te, a science and technology forum at www.tinhte.vn under the username Fullove.
To unlock an untethered iPhone 4S, users must have a USB sim card reader, a magic sim (6 in 1), a local network sim card, and a sim produced by the Internet service provider that locks the phone, such as AT&T, T-Mobile, Telus, Bell or SFR, Tuan said.
He showed that the unlocking is carried out through four steps on his AT&T iPhone 4s:
Step 1: Plug the AT&T sim into the USB sim card reader using Magicsim v255 to back up ICCID, IMSI, and SMSC of the AT&T sim.
Step 2: Plug the local sim into the USB sim reader. In his case Tuan used a Beeline sim with Magicsim_v255 to get the parameters of the sim including ICCID, IMSI, SMSC and KI – the most important tool to clone a sim.
Step 3: Plug a magic sim (6 in 1) into the USB sim reader and record at location No. 1 the above ICCID, IMSI, SMSC and KI of the AT&T sim and record at location No. 2 the the Beeline sim’s ICCID, IMSI, SMSC and KI that have been taken from the USB sim card reader.
Step 4: Plug the magic sim (6 in 1) into the iPhone and carry out the process: settings -> phone -> sim Applications -> Switch Number where the user selects the Beeline sim -> main screen. The iphone will activate its search carrier and identify the Beeline network. The subsequent manipulations are illustrated in a video clip attached to Tuan’s posting on the forum’s website.
A part of Le Minh Tuan's posting on www.tinhte.vn., a science and technology forum
ResponseTuan’s posting has stirred up the forum with tens of thousands of hits and comments, with many ny iPhone 4S users agree that this is a possible way to unlock an iPhone 4S in Vietnam to use it through the local Internet service providers.
However, The most difficult thing to do is to search for the KI using a local SIM, since SIMs of the latest versions have been secured by COMP-2 instead of KI, as in several years ago. Therefore, the search for KI using a USB SIM card reader will be very hard, even impossible.
A member of Tinhte confirmed that Tuan’s unlocking method helped that member unlock an iPhone 4S using a SIM card from 2005.
However, the fact that an iPhone 4S can be unlocked only with SIMs of older versions made it hard for most users to unlock their phones. Minh Hoang, another member of the forum, said, “How can I have a SIM card produced in 2005 or older search for KI?”
On the other hand, Le Hoang Tung, who is in charge of technical issues at VinaPhone, said KI is a system code that is not allowed to be disclosed for confidentiality purposes.
Tran Thinh, from the technical department of military-run Viettel group said, said, “KI is a password that is not provided to anyone. Viettel SIMs are now secured by COMP128V2 with high confidential ability, and if users try to search for KI, their SIM cards may be ruined.”
Tien Duong, who is in charge of iPhone unlocking services at a phone company in Hanoi, said, “The method of unlocking introduced on Tinhte is right, but it is not highly feasible, since Internet service providers in Vietnam have strengthened security ability for their SIM cards following the many cases of SIM hacking that have happened.
It is too early to conclude whether Tuan’s unlocking method is really feasible or not, but after it was introduced online, the selling price of the untethered iPhone 4S has increased by 20 percent on the market.
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