Use Find My Device via your Google account to lock your phone, display a message, or erase its data.
Immediately inform your mobile carrier about the theft. They can suspend your service and prevent the thief from making calls, sending texts, or using data.
Change the passwords for your email accounts, social media profiles, and any other critical accounts linked to your phone.
Report the theft to the local police. Provide them with the phone's make, model, and IMEI number. A police report can be essential for insurance claims and for tracking stolen devices.
Keep an eye on your bank and credit card statements for any unauthorized transactions.