How to Make a Locked iPhone Accept Any Sim
Happy with your iPhone, but think you are paying too much for data and text messaging? We’ve all there before, to be honest. Sometimes switching carriers is a good idea, but there can be a small downside: if your iPhone locked on a particular network, you’ll need to unlock it before it can accept another carrier’s SIM card.
If this sounds complicated, don’t worry. Below all the information about how to unblock cellular carriers. Remember that an operator lock different from a screen lock. The latter prevents you from accessing a phone, while carrier lock prevents you from using another carrier (if you have Verizon, you cannot use AT&T until the device unlocked).
Here’s how to tell if your(phone) iPhone is locked
There are several ways to know if your iPhone unlocked. Let’s go through the methods.
Use a SIM card
Not sure if your phone locked? Well, that’s pretty easy. Just take out your current SIM and try a new one from another provider. If you bought your iPhone directly from an Apple Store, it unlocked by default, so switching between SIM cards from different networks quick and easy, and you don’t even have to restart your phone.
But, if your iPhone locked, you will get error messages like “Invalid SIM” or “No SIM card installed.” This may not mean your phone locked; it could be an iOS attack. With this mount, it’s just a simple case of turning airplane mode on and off and rebooting the phone or reinserting the SIM card.
Alternatively, go to Settings | General | Info, and tap “Check for carrier settings update.”
Note: If possible (in the GSM network), it better to use a SIM card from T-Mobile or AT&T. Some CDMA phones require particular SIM cards, which vary depending on the phone model. This means that your mobile may be unlocked, but it won’t recognize the SIM card you have inserted.
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