Forgot how to check the old mobile phone number.

The inquiry methods for forgetting the old mobile phone number include: inquiring the mobile phone card sticker, searching the mobile phone short message, and contacting the operator's customer service.

1. Query the mobile phone card sticker: If you have ever used the mobile phone card sticker, you can find the corresponding mobile phone number on the sticker.

2. Find SMS: If you have used this mobile phone number, you can check the SMS record of the old mobile phone and find the mobile phone number.

3. Contact the operator's customer service: If you can't find the mobile phone number by the above methods, you can contact the operator's customer service for inquiry. Provide identification and other relevant information, and the operator's customer service will verify it according to your information and tell you your mobile phone number.

How to store mobile phone numbers?

Before the popularity of smart phones, handwritten notes were a common way. Just write it down in a paper address book or notebook. However, handwritten records have advantages and disadvantages. Paper is easy to be damaged, lost, easy to read and harder to find in the warehouse. With the popularity of smart phones, people increasingly use mobile phone address books to manage phone numbers.

Cloud storage is a way to store and process data by using the Internet. Through cloud storage, we can conveniently record our phone numbers in the cloud and synchronize them to all devices in real time, so that our information can be updated on each device in time. We can use Baidu address book to record all our phone numbers on Baidu Cloud.