I want to register my number for momo through *502# but the reply am getting is invalid registered email

Hi Idris, it could be that the email you used to register your line is invalid, you may need to do SIM registration update to correct the email address; however, if you are sure that you used correct email, it may be a system issue, you need to contact MTN support for assistant.

You can contact MTN support via any of these channels:
1. MyMTN App
2. Facebook: @MTNLoaded
3. Instagram: @MTNNG
4. Live Chat: http://bit.ly/2OC5bHz
5. Email: customercareng@mtn.com
6 .WhatsApp: 09033000001