The MTN 6 months free calls is only available for individuals whose MTN sim is not yet 6 months old. If your MTN sim card is more than 6 months old, you can not participate in this offer. But then you can register anytime you buy and register a new number.
Apparently, the short code to access this amazing offer is *550#

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Steps tom Activate MTN Free Calls For 6 Months (Magic Number)
- Dial *550#
- Enter the phone number you are willing to call for free
- And lastly confirm
After this process, once your request is accepted, you can make free calls for a maximum of 6 months.
#NB: You call only that number for free, you will need to have airtime when trying to call a different phone number either an MTN line or other networks.

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