Tā yī shēngqì jiù huànhào, shéi yě liánxì bu shàng.
Whenever he gets upset he switches numbers and no one can reach him.
Tips
usage
Most commonly refers to switching mobile phone numbers (手机号). Because Chinese numbers tie to bank accounts, WeChat, real-name ID etc., 换号 is a big-hassle process — triggering apps to re-verify. Also used for swapping QQ numbers or gaming accounts.
