6th December 2019
What happens when you put a SIM card in an unlocked phone?
Your SIM card allows your phone to connect to GSM networks. Similarly, if your phone is unlocked, you can insert SIM cards from different carriers into it, which can be useful when traveling. When switching between phones, you'll need to make sure that the new phone will accept the SIM card from your carrier.
SIM cards are the unseen magicians of today's smartphones. They make connecting to networks and switching phones as easy as removing a small metal tray. If you buy a new phone, you can simply insert your existing SIM and keep on using your existing service as long as the new phone isn't locked to a different carrier.
Can I move my cell phone service just by moving my SIM to a new phone? These phones have to be either provided by your cell phone provider or they have to be unlocked phones. With unlocked phones, you can always switch your phone service between different phones as easily as popping out the SIM card and moving it.
Place a SIM card for a different network in the phone and it will ask you for that code. Enter it (sometimes a reboot is needed) and the SIM should be recognized. The SIM card you use for unlocking doesn't have to be on a line that is yours. But your carrier might not want to unlock your phone.
A SIM card, also known as a subscriber identity module, is a smart card that stores data for GSM cellular telephone subscribers. Such data includes user identity, location and phone number, network authorization data, personal security keys, contact lists and stored text messages. GSM devices hold contacts.
To unlock it you must reset your PIN by entering your SIM card's unique unlock key (also called a PIN unblocking key or PUK). To unlock your SIM card: Log in to MyBell and retrieve your unlock key. Enter the unlock key on your mobile phone.
We would like take a moment and explain the difference between a "locked" and "unlocked" cell phone. In the USA Cingular (ATT) and T-Mobile are the 2 large GSM carriers. Sprint and Verizon use CDMA phones which usually don't require a SIM card. First, a locked phone means that it will only work with 1 specific carrier.
Getting an unlocked phone that wasn't specifically made to work with Verizon on its network is tricky. The CDMA/voice issue pretty much ensures you need a device that's made for Verizon. There are a few exceptions. The good news is that all of Verizon's 4G LTE phones come unlocked out of the box.
Locked / Unlocked. iPhone 4 on O2, Orange and Vodafone. Definition: A 'locked' mobile phone is one that has been restricted by software so that it can only be used with a single network or carrier. Locked mobile phones are usually GSM phones that use a SIM card - hence the use of the term 'SIM lock'.
All unlocked phones work on carriers that use GSM networks. Popular U.S. carriers that use GSM networks include AT&T, T-Mobile, Cricket, MetroPCS, Simple Mobile and Tracfone. Most foreign carriers also use GSM networks. You will need to use a SIM card from a GSM provider to get service for your unlocked phone.
Before we get to the carriers, however, you should check to see if your phone is locked.
- Find out if your phone is already unlocked. You may not need to request your carrier to unlock your phone.
- Closing caveat.
The simplest reason to unlock your phone is to use it on another GSM network. U.S. GSM virtual carriers compatible with unlocked phones include Cricket, MetroPCS, Simple Mobile, Straight Talk, H2O Wireless, Black Wireless, Ready SIM, and many others. Large CDMA carriers, in general, do not accept unlocked phones.
A SIM card, also known as a subscriber identity module, is a smart card that stores data for GSM cellular telephone subscribers. Such data includes user identity, location and phone number, network authorization data, personal security keys, contact lists and stored text messages.
If you have two AT&T phones, or two T-Mobile phones, you can transfer wireless service between them by moving the SIM card from one device to the other. You don't have to take your phone to a retail store, or otherwise get any special permission to switch.
What Is an Unlocked Cell Phone or Smartphone? An unlocked cell phone is one that is not tied into a certain carrier's network: It will work with more than one service provider. Most phones are tied – or locked – to a certain cellular carrier, such as Verizon Wireless, T-Mobile, AT&T, or Sprint.
Unlocked GSM phone means that it wouldn't be locked into a specific carrier network. On the upside it means freedom to choose your own GSM carrier that suits your needs (and wallet) best. On the down side several carrier-specific features may not be available.
There's no such thing as an iPhone SIM card, Apple only manufactures the phone, not the SIM. The SIM comes from whichever network you use, and will work in other phones. You may need an adapter, however, as iPhones take nanoSIMs, whereas other phones might take regular or micro sized SIMs.
Global System for Mobile
Unlocking an iPhone means taking an iPhone that is locked to a specific carrier and making it usable on other carriers. A software unlock is the process by which the iPhone is modified such that the baseband will accept the SIM card of any GSM carrier.
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. EV-DO is the 3G technology used on CDMA networks.