Hello Thiên Phúc, first of all, Mytour would like to express our condolences for the loss of your phone and SIM card. Regarding your situation, Mytour would like to respond as follows:
By default, when registering for Zalo, each Zalo account corresponds to a phone number for registration. Therefore, the phone number is also the key factor for you to retrieve your Zalo password. In the case where you, Phúc, lost your phone and SIM card, it also means that the Zalo hotline will be unable to contact you to provide the confirmation code to change the Zalo password on your phone.
Thus, the only solution for you, Phúc, is to register a new Zalo account, then add Zalo friends on Android or add Zalo friends on iPhone as desired (since the type of phone is unclear) from scratch if you previously used the method of adding Zalo friends on Android or adding Zalo friends on iPhone via the address book. Adding Zalo friends afterward may not require the address book.
The issue of losing a phone and being unable to retrieve the Zalo password has become quite significant and many people encounter it. The reason lies in the fact that Zalo only allows registration and login via phone numbers. This severely limits users because they cannot retrieve the Zalo password simply due to a lost phone or SIM card.
Hope for significant improvements in Zalo usage in the future, especially adding Zalo login via email or Facebook account to make it more convenient for users in many cases where they want to retrieve Zalo password without a phone for confirmation.
In contrast to Zalo, Viber, Skype, or Facebook Messenger are currently excelling in the area of account and password management for users. As a result, users can easily retrieve Viber, Skype, or Messenger passwords with linked accounts via email or Facebook.
Hope this answer has satisfied the curiosity of you, Phúc, and many others.