VERY IMPORTANT: No matter what you do to unlock a GSM/CDMA phone, they will ONLY work on a network with the same technology. So if you unlock a GSM phone, it will work on other GSM networks, but it will never work on a CDMA network (since there is no SIM card to put in the phone) and vise versa.
So in order to unlock a GSM phone, you can either get the code from you carrier or you can purchase one from an unlock code supplier, once you input the code, your phone will be able to use any GSM carrier you want by just swapping out the SIM card.
Unlock cdma phone online
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In order to unlock your CDMA phone, you need to find a CDMA flasher/unlocker in your area and physically bring them your phone for them to flash to whatever network you want (you must know what network you are planning to use as they can only flash it to one carrier at a time).
There used to be two cellphone technologies that were used by the majority of the world's mobile phone service providers: Global System for Mobile communication (GSM) and Code Division Multiple Access (CDMA). If you had a CDMA phone, then your phone was unlockable. However, if your phone operated on a GSM network, then it might be unlockable.
What's the difference? GSM phones used subscriber identity module (SIM) cards. A SIM card is a small card that's inserted into the phone. It contains all your contacts and settings, and it's linked to your account. You could take the SIM card out, put it into another phone, and if someone called your number, the new phone would ring. You could also put a different SIM card in your unlocked phone, and your phone would then work with whatever phone number and account was linked to that card. CDMA phones had no SIM cards and needed to be authenticated by the service provider, which made unlocking a phone impossible.
Action Link Wireless can unlock or flash most cell phones, including both GSM and CDMA devices! Contact us to confirm your phone compatibility. We also now offer unlocking and flashing remotely or by mail service. Fill out this Flashing Request to get started.
Action Link Wireless can now factory unlock all AT&T iPhones so they can be used on other phone carriers. Once unlocked, they will stay unlocked forever and can still be updated with future iOS and firmware upgrades. An unlocked iPhone can be used on T-Mobile or other GSM networks instead of being restricted only to AT&T. Which means you can choose the company with the best coverage and rates for your needs. If you live or travel out of the country, you can even switch to a foreign carrier and avoid paying international roaming charges.
Many cell phone service provides issue Code Division Multiple Access (CDMA) phones to their subscribers as a way of ensuring the phones are not usable on rival networks. CDMA phones employ special software "locks" that prevent use of the phone on other networks, and you must unlock the phone if you want to use it with another provider.
To unlock a CDMA cell phone and remove network restrictions, you must enter a special "unlock" code. The service provider that issued the phone can provide you with the needed code; however, the company will usually charge a hefty fee before they give it to you. For most CDMA phones, though, there are usually other less expensive sources for the unlock code.
Call the cellular service provider that issued you the phone. Provide the company representative with information to verify your account. Also, provide the customer service representative with the model number of your phone and its IMEI number. Ask the representative how much the provider charges for providing you with the unlock code for your phone. Write down the price quoted to you by the customer service representative.
Browse websites of online companies that provide unlock codes for your model phone and compare prices. Online companies such as Cell Corner, Cellular Locksmith, Unlock to Talk and others usually offer lower unlock code prices than cellular phone service providers. An Unlock code provided by one company will be the same as one offered by another vendor because of the mathematical algorithms used to derive the code. Therefore, choose the vendor with the lowest price for the unlock code.
Buy the unlock code online or call the company and make your purchase over the phone. Wait for the service to provide you with the unlock code via email or over the phone, then write down the code sequence. Some unlock codes consist of only numbers, while others are a series of numbers and other characters.
Wait for the phone to prompt you for an authorization code to change networks, then enter the unlock code on the keypad and press the "OK" key. Wait for a "Restriction Off" or similar message. The phone is now usable with the new service provider's network.
In this edition of Ask Maggie, I re-examine this issue and offer some basic information about what a cell phone lock is. I explain on which wireless networks cell phones can be unlocked. And I caution consumers to investigate before they buy a device they think is unlocked.
Generally, the only devices that do not have carrier locks are ones that specifically say they are "unlocked," such as the Google Android Nexus brand of devices, the unlocked version of the iPhone, which is sold at the Apple store, and some developer edition devices. If you want an unlocked phone, you should research in advance whether the phone you are purchasing is available as unlocked and where you can buy it as an unlocked device. Remember: Paying full price alone doesn't guarantee that a smartphone is unlocked out of the box.
What is a phone lock? The lock is really a software code that's put on the phone by the manufacturer as per the requirement of the carrier that sells the device. And the lock is meant to ensure that the phone can't be used on any other operator's network until a different software code is entered to unlock the device.
All GSM devices are designed so that service is provisioned using a SIM card. With an unlocked device, a GSM smartphone can be reprovisioned and used on another network simply by popping out the old SIM card and putting in a new one from the new carrier. The carrier doesn't necessarily need to be notified, and you don't need anyone in the store to reprovision your phone.
In summary, phone locks are not really relevant when you're talking about 2G and 3G devices that operate on CDMA or EV-DO networks. But phone locks are very important for devices that operate on a GSM or HSPA/HSPA+ network. Almost every GSM device comes "prelocked" to a particular carrier. Certain phones are sold unlocked. And if you have a device that is locked, you can get it unlocked from your wireless carrier if you meet certain criteria, which includes paying the full price of your device or ending your contract and being in good standing with your service provider.
Remember that in the U.S., Verizon and Sprint customers use either a Verizon or Sprint CDMA network. The GSM radio is included in these phones so that subscribers can roam onto networks in Europe and other parts of the world. Verizon and Sprint subscribers can choose either to sign up for international roaming plans with their U.S. carrier when they travel, or, if they can get their devices unlocked, they can swap out the SIM, put in a SIM card from a local provider, and get new service that way.
Verizon 4G LTE devices are unlocked out of the box One thing to note here in terms of software phone locks is that all Verizon 4G LTE smartphones come unlocked out of the box. The reason why is that the spectrum Verizon is using to build its 4G LTE network had restrictions put on it by the Federal Communications Commission, which required the company to allow "open access" to the network. So as part of this provision, Verizon has decided not to lock those devices. That said, its 3G devices are locked.
So what does this mean for the average consumer? Let's take the iPhone 5 as an example. It's a 4G LTE device. A Verizon version of this phone comes unlocked out of the box. There aren't special codes that need to be entered in order to use it on another carrier's network. But because of the spectrum differences I mentioned above, a Verizon iPhone 5 won't operate on AT&T's LTE network. It will operate on AT&T's 3G network, which is based on GSM. So this means you can use the Verizon iPhone on AT&T, but you won't get the fastest Internet speeds on it.
What are the explicit differences between a locked and unlocked phone? The difference between a locked and an unlocked phone is that a locked device has a software code on it that prevents you from taking a GSM-based device and using it on another GSM carrier's network. An unlocked phone either doesn't have the lock software on it or someone was able to get a code that unlocks the software. Once a device is unlocked, you can pop out the SIM card and put in a different SIM from another GSM operator and get service. Remember that this issue of locked and unlocked phones today is really only relevant when you're talking about devices made for GSM networks. It doesn't really apply to CDMA-only devices or for swapping out SIM cards for LTE networks. As I explained above, most carriers use different frequencies and band plans for their LTE networks, so even without a software lock on the device, it still won't operate on these networks. That will soon change, but for now don't expect unlocked LTE devices to perform at top speeds on any other carrier's LTE network.
Why is the iPhone treated differently by carriers relative to other phones? In the past, the iPhone was treated differently than other devices when it came to lock codes. For instance, AT&T was happy to unlock any other phone you owned, but according to its policy, the iPhone could never be unlocked. The reason for this was because AT&T didn't want people buying the popular phone and going to another carrier, whether that was T-Mobile or an overseas operator. So to control how and where the device was used, it refused to unlock it. 2ff7e9595c
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