I changed my mobile phone when I arrived in Suzhou and couldn’t log in.

It may be because when you log in for the first time with the original mobile phone, the software not only records your number, but also records your mobile phone model and other device information. This is also for information security considerations.

When you change your mobile phone and want to log in to some apps, you may need some verification steps to ensure that it is you who is doing the operation and that your personal information is not leaked.

Suzhou, referred to as "Su", formerly known as Gusu and Pingjiang, is a prefecture-level city under the jurisdiction of Jiangsu Province. It is one of the important central cities in the Yangtze River Delta approved by the State Council, a national high-tech industrial base and a scenic tourist city. .