Do you know how to check the size of a small mobile phone?

1: For users with trumpet, dial Unicom or mobile customer service phone, and then enter trumpet according to the prompt tone to find the corresponding large size.

2: You can take your ID card to the lobby to check all the numbers under your ID card before you can see it.

3. It can be found by making a bill in the business hall, but it may not be found in a short time.

The working principle of mobile phone trumpet is actually very simple. The user binds the host number to the trumpet, and can directly dial the other party's number when making a phone call. The trumpet will automatically transfer the call to the called party, and the called party's mobile phone displays the user's trumpet number, while the host number is "invisible" to the called party. Text messages and phone calls received by the small mobile phone number will be transferred to the mobile phone number where the user logs in to the small APP.

Extended data:

Trumpets are generally handled in the province (unheard of nationwide), which can be mobile phone cards before cities in the province or in the same city (they must be from the same company or between China Unicom and China Mobile). Anyone who has completed the trumpet can make free inter-provincial calls, with a monthly fee of 5 or 10 yuan.

Some trumpets also give away talk time, which is more cost-effective.