Dealing with activation problems
and technical support

Choose the item matching the issue you are facing and follow the instructions.

I didn’t receive the user activation email
The email address I entered when registering is definitely correct
I didn’t receive the activation email
The email address I entered when registering is wrong
I didn’t receive SMS with the activation code
The mobile phone number I entered when registering is wrong
I need technical support
For technical issues or issues with myΔΕΗ app
I'm looking for more information about myΔΕΗ
All the answers and helpful information here

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For myDEI technical support you can contact us here or call from a Greek landline/mobile for free at 800 900 1000 (option 3). If calling from abroad, please dial +30 211 211 0770.
For international calls you can call
+30 211 211 0770