i have had my phone stolen

lorrrrrrrr Said:

"how do i delete all my data on my stolen iphone?"

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Use Find My:

Was Find My enabled? If not, then there is nothing you can do, and it is meant to be enabled prior to losing the device. If it was, then use that link to erase it.

Modify your Credentials:

Considering this was stollen you should be concerned about you account information being compromised. So, by all means modify your credentials. You are able to log into these forums just fine. So, log into iCloud, and modify your credentials, starting with a new, strong password and using a new eMail address (for Apple).

• Modify: your login credentials (Using Both a New eMail and a New Passwordfor each and all sites)
• Associate: a different method of payment to your account
• Enable: Two-Factor Authentication for Apple ID and for all other accounts that have such an applicable option

• Look for your device on a map. To find your device, sign in to ➔ iCloud.com/find . Or use the Find My app on another Apple device that you own. 
• Mark as Lost. 
• Report your missing device to local law enforcement. 
• File a Theft and Loss claim. 
• Remotely erase your device. 

Here is more information on what to do ➔ If your iPhone has been lost or stolen

Axel F.

read the steps here

https://support.apple.com/en-us/HT201472

you can use find my using www.icloud.com from a computer browser