Messaging app Zalo is currently reviewing user accounts registered with phone numbers that have been deactivated or reclaimed by mobile carriers. The company is collaborating with network operators to identify affected accounts and is urging users to update their registered information. This action aims to enhance account security and prevent unauthorized access. Zalo did not specify the number of accounts potentially impacted by this review. Users are advised to verify their account details within the app to ensure continued access. The move comes as a proactive measure to address potential vulnerabilities related to recycled phone numbers. This review process is ongoing and Zalo will likely provide further updates as it progresses.