What does the HD next to the cell phone battery mean?

The HD next to the battery capacity of the mobile phone is VoLTE HD voice service of China Mobile.

Go to Settings-(More Connection Settings)-Mobile Network-HD Voice-Close and Cancel.

VoLTE is a free upgrade of ordinary telephone service. High-definition voice service, like making phone calls and sending text messages, is a free basic service function that mobile phone numbers automatically enjoy, and there is no function fee.

In the 4G network environment, the words "HD" or "VOLTE" will appear in the column of user's mobile phone model, indicating that the VOLTE service has been successfully launched.

Video call: VoLTE network's unique video call function (requires terminal support), which provides high-definition video call under 4G network. Video call does not generate traffic charges, and only charges 0.29 yuan/minute for calling number, which is a national long-distance call, local call and roaming price.

Ordinary call: users make high-definition voice calls according to the call duration, which is included in the voice package that users have ordered, and the part beyond the voice package is implemented according to the voice tariff standard outside the package in the user marketing plan. Roaming and long-distance charges are implemented according to the relevant rules in the user's marketing plan.

To handle the program control function of VoLTE service, the SMS opening mode is to send KTVOLTE to 10086, and the SMS cancellation instruction is to send QXVOLTE to 10086.