After the phone number is cancelled, it will be used by others. Will privacy be leaked?

I don't think so. A lot of information will be deleted after cancellation.

Extended data:

Mobile phones are divided into smart phones and non-smart phones. Generally, the performance of smart phones is better than that of non-smart phones, but the performance of non-smart phones is more stable than that of smart phones. Most non-smart phones and smart phones use the CPU of British ARM company. Smartphones have higher main frequency, faster running speed, faster processing tasks and more convenient daily life (such as Nokia n8 1 main frequency of 369 MHz); Instead of smart phones, the frequency is relatively low and the running speed is slow (for example, the main frequency of Nokia 5000 is 50 MHz).