Iphone 12 switches between primary and secondary phone numbers -iphone 12 switches between SMS sending numbers.

Iphone 12 is still very good as a 5g iphone model. In terms of performance configuration, it is worth experiencing by friends. Iphone 12 series has not improved much on iphone 12 series, so it is still very cost-effective to start with preferential activities. Let's take a look at the primary and secondary card switching of iphone 12.

Iphone 12 switch between primary and secondary cards. iphone 12 does not need to switch between dual cards when making calls. When dialing, you can choose whether to dial the primary card or the secondary card. Setting method: Open the dial-up APP, select the address book, click the number to be dialed, and select the main number below the name to choose switching. You can also dial APP- keyboard and click the major/minor number at the top of the page to switch.

It should be noted that the iphone 12 Mini version does not support dual-card dual standby, and you cannot switch numbers to make calls.

Why is the iphone's voice low?

First, make sure your voice is low, whether you hear someone else's voice or the other person's voice is low.

If listening to other people's voice is small, one is the microphone problem of the other party's mobile phone, and the other is the receiver blockage; Third, the handset volume setting is too low; The fourth is the signal problem; Fifth, if there is a protective film, please confirm whether the protective film is attached to the receiver. If it is a microphone problem, suggest the other party to repair it. During the warranty period, you can contact Apple for after-sales maintenance. If it is the latter two, please check the receiver or adjust the volume button on the side of the phone. Or talk to a place with a better signal.