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How to Unlock and Activate iPhone Using R-Sim, X-Sim and Gevey Sim Card Interposers

Updated on September 8, 2017
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Alfred is a long-time teacher and computer enthusiast who works with and troubleshoots a wide range of computing devices.

Just as it is possible to unlock and activate iPhones using Ultrasn0w software hack (now obsolete for iPhone 4S and above), and IMEI number for permanent unlock, iPhone unlock is also possible using a host of proprietary overlay sim interposers.

An iPhone 5, sim card, R-sim interposer and sim tray
An iPhone 5, sim card, R-sim interposer and sim tray

Overlay sim interposer exploits are hardware based and depending on the brand manufacturer, you can use it to unlock either jailbroken or non-jailbroken iPhones.

Sim interposer exploits do not provide permanent iPhone unlock: this means you will lose the unlock status once you discard the interposer or upgrade the iPhone firmware to one that is not supported by the interposer hardware.

However, iPhone warrant remains valid as long as you don’t jailbreak it.

Those that have chosen to unlock their iPhones using sim card interposers do so because these chips come cheap and are available almost everywhere. A typical sim card interposer goes for less than $20 dollars in most retail and online stores.

How Sim Card Interposers Work

An overlay sim interposer is a miniature chip(s) embedded within a thin plastic circuit board which usually mimics the shape of a sim card.

To use the interposer, you place it beneath your new sim card. Then you place the two onto the iPhone sim tray.

Once inside the iPhone, the interposer sits between the sim card and sim card reader. (See image below)

Sim card and sim interposer
Sim card and sim interposer

The interposer hardware now becomes the go-between the carrier sim card and iPhone sim card reader and basically tells the iPhone how to read network signals!

The interposer chip hoodwinks the handset into thinking it is unlocked and thus permitting voice and data signals to take place.

Popular Sim Interposer Devices in the Market

There are quite a handful of sim card interposers in the market today and new versions of existing models are released regularly.

Depending on iPhone model and IOS firmware, you should purchase an interposer that best suits your unlock requirements. First, you must research about a host of them and visit their websites and portals before forking out your cash.

Or, you can go through the info illustrated below in order to make informed choices.

For example, you should go for an interposer that supports GSM, CDMA and other popular cellular related features. A few of them ship without support for 3G and 4G connectivity and messaging capabilities and may require jailbreaking and installation of third party patches.

The following are popular proprietary sim card interposers:

  • R-Sim
  • X-Sim
  • Gevey sim
  • Heicardsim
  • GPP sim
  • R-Sim mini

R-Sim 7 interposer
R-Sim 7 interposer

From the list above, R-Sim interposers, in particular, seem to have captured the most market. R sim devices are made by a Chines company called Shenzhen RGKNSE Technology Development Co.

RGKNSE has a handful of popular interposers stretching back from R-Sim 5, to the current 10, and it supports iPhone unlock starting with 4S right up to 6+.

Popular R-Sim versions are named in a variety of tastes, and this is due to individual features the various interposers can help activate:

• R-Sim 7, 7+

• R-Sim 8, 8+, 8GOLD

• R-Sim 9, 9+, 9PRO, 9GOLD

• R-Sim 10, 10+, 10GOLD

Recommended Sim Interposers for Different iPhone Models and Firmware

Whereas you can ignore interposer limitations by installing an old one in an iPhone running higher IOS firmware version than is recommended, it is always wise to stick to IOS guidelines printed on the package.

This way you avoid missing out on features and proceeding stress-free.

Below are various interposers and respective iPhones they support:

  • R-Sim 7

iPhone 4S and 5 running IOS 6 and 7.

  • R-Sim 8

iPhone 4S and 5 running IOS 7.

  • R-Sim 9

iPhone 4S, 5, 5C and 5S running IOS 7 and 8.

  • R-Sim 10+

iPhone 4S, 5, 5C, 5S, 6, 6+, 6S, 6S+, SE and running IOS 7, 8, 9.

  • R-Sim Air

iPhone 4S, 5, 5C, 5S running iOS 6, 7 on Sprint+N.

  • Gevey Ultra S

iPhone 4S, 5, 5S running IOS 5 to 9.3.2

  • Gevey Ultra

iPhone 4 up to IOS 5.1.1

  • Gevey US

5S, 6, 6S, SE running IOS 6 to iOS 9.

  • New Gevey

iPhone 4S, 5, 5C, 5S, 6, 6+, 6S, 6S+ running IOS 7, 8, 9.

  • X-Sim Evo Ultra

iPhone 4S, 5, 5C, 5, 5S, 6, 6+, SE, 6S, 6S+ running IOS 6, 7, 8, 9.

  • Heicard SIM

iPhone 4S, 5, 5C, 5S, 6, 6+ running IOS 5, 6,7, 8.

R-Sim Mini Upgrade!

In case you want to maintain one sim card interposer for a longer period, you may want to shop for the upgradable r-sim interposer and its reader.

RGKNSE makes R-Sim mini which can be upgraded even at home, using R-Sim dongle updater.

You simply download and upgrade the firmware within the r-sim to the latest one everytime newer patches are available, or when you have upgraded to the latest iPhone firmware.

Recommended Sim Interposer/iPhone Combinations

(click column header to sort results)
R sim 10+
R SIM 10
X Sim Evo
Gevey US
R Sim 9 Pro
Gevey Ultra S
Gevey Ultra
Heicard sim

Most interposer packages usually contain:

  • R-SIM PRO Interposer card
  • Micro sim adaptor tray for older iPhones
  • Tray Clip

What is your preferred sim card interposer?

See results

Procedures to Unlock iPhone using R-Sim Interposer

There are no strict procedures that should be followed when unlocking the iPhone using R-Sim. It all depends on iPhone and R-Sim model, but overall, the steps are almost the same.

You will be guided on what to tap and as long as you know the carrier network that sold your iPhone, you should accomplish it safely.

You can always try again when the first attempt fails.

In order to unlock and activate iPhone using R-Sim:

  • Insert the r-sim interposer + sim card + adapter tray into the iPhone.
  • The interposer setting menu should automatically popup and let you configure it.
  • Otherwise, go to Settings>Phone>Sim Applications to get started.
  • To configure, tap Carrier select or similar title.

  • Select carrier to which your iPhone is locked to from the menu that pops up.
  • You may need to manually enter the IMSI code of the network provider if the network in question is not listed.
  • To do this, tap input IMSI to continue.

  • Next select your iPhone model.

  • Then you will have to select carrier mode from the list that pops up. (i.e. 3G/4G)

  • You will be prompted to restart iPhone.
  • Click Accept to restart iPhone to complete unlock and activation process.

Sometimes, activation of Sprint/Verizon/Japan AU may hit a snag especially with older sim card interposers.

As a result:

  • IPhone may not show signal
  • Text messaging may have issues
  • Etc

To bypass this, you will have to install appropriate auxiliary patches for a fee or free. This RPatch file is provided by the manufacture of the interposer.

Troubleshooting R-Sim Issues

Following the installation of a new interposer, some carrier related features may fail to work in one or other IOS firmware depending. To be on the safe side, you may want to purchase a newer interposer if you own a new iPhone model and OS firmware.

Also pay attention to the support details printed on the interposer package for compatible sim card and firmware versions.

Consider the following options if the interposer fails to perform to your expectations:

  • Your sim card may not be compatible (64k versus 128k)
  • Your sim card may be damaged
  • You IOS firmware files may be corrupted
  • The IOS firmware may not be compatible
  • The interposer may be defective
  • Turn Airplane On or Off
  • Eject and then insert sim tray
  • You may need to install a patch
  • You may need to jailbreak your iPhone
  • You may need to restore iPhone when everything fails

Risks of Using Overlay Sim Interposers

Whereas the use of an interposer is as simple as sticking one in and out of your iPhone, you may need to be aware of the risks that go along with doing so.

Use of interposers can expose your iPhone to the following:

  • You can damage your sim card reader. By attaching additional width to the sim card and tray, you are adding additional burden and pressure onto sim reader which can fail as a result.
  • Suspect developers may bundle in additional codes to the sim interposers for sinister purposes. Sim interposers may facilitate the man in the middle attack when hackers choose to attach exploitative codes. This is particularly so in upgradable mini sim interposers.

© 2016 Alfred Amuno


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    • goodnews11 profile image

      OSBERT JOEL C 6 days ago from CHENNAI

      Great article