Get somewhere safe
Move away from the situation. Do not confront the person who took the phone or attempt a physical recovery.
Your safety comes first. Do not chase, confront or meet a thief to recover your phone.
Move away from the situation. Do not confront the person who took the phone or attempt a physical recovery.
Use Apple Find My / Lost Mode or Android Remote Lock as soon as possible.
Report the crime to the Metropolitan Police. Have the time, location, circumstances, make/model and IMEI available if you know them.
Tell banks and financial providers connected to the phone. Freeze cards or accounts if appropriate and watch for transactions you did not make.
Tell your network provider that the phone has been stolen. Ask about blocking the device and protecting your number and two-step verification messages.
Change passwords for your email, banking and important social accounts. Review active sessions and sign out devices you do not recognise.
Be suspicious of messages claiming your phone has been found. Never give anyone your passcode, password or verification code.