Why does my iPhone have no signal? How can I restore my iPhone contacts after changing the SIM card?

The soul of a mobile phone is to receive signals to serve us. If there is no signal, no matter how good the phone is, it is just a decoration and a sample. Usually, the reason why there is no or very weak mobile phone signal is not just one-sided, but also includes many situations. Let’s take a closer look below!

Contents of this article

1. Why does the iPhone have no signal?

2. How to restore the contacts after changing the SIM card of an Apple phone

3. How to set an Apple phone password

Why does my iPhone have no signal?

Sometimes the reasons why an Apple phone has no signal include: network setting problems, system software problems, poor surrounding network, SIM card problems, phone hardware problems, etc. Sometimes the phone is in a state of no service due to poor surrounding network. Changing to a place with good network can solve the problem.

If your phone has no signal, it may be due to a problem with the SIM card. You can remove the SIM card and check if it is damaged or worn. You can also use an eraser to wipe the SIM card chip and then reinstall it.

After using an Apple phone for a long time, the phone may not be able to connect to the network due to some reasons of the system itself. You can try to solve the problem by restoring the network settings and returning to the default factory settings.

If this problem cannot be solved after multiple methods, it is likely that there is a problem with the phone's hardware. In this case, it is recommended to go to Apple after-sales service for help.

Operating Environment

Brand model: iPhone12

System version: ios14.7.0

How to restore contacts after changing SIM card in Apple phone

After changing the SIM card of an Apple phone, you can restore the contacts through iCloud. The specific operation method is as follows: 1. Open the settings of the phone. 2. Click the avatar of the Apple ID. 3. Click "icloud". 4. Turn on the button behind "Contacts" and the system will automatically restore the phone's contacts.

1. Open your phone’s settings.

2. Click on the Apple ID avatar.

3. Click “icloud”.

4. Just turn on the button behind "Contact Book" and the system will automatically restore the phone's address book.

Operating Environment

Brand model: iPhone12

System version: ios14.7.1

How to set a password for an Apple phone

How to set a password for an Apple phone:

1. Open your phone’s settings.

2. Click the "Face ID & Passcode" button.

3. Click the "Open Password" button.

4. In the password setting interface, enter the password you want to set, then complete the subsequent verification and confirm to complete.

Operating Environment

Brand model: iPhone12

System version: ios14.7.1