How do i get the 300 free incoming minutes?

The offer is now free 100 incoming minute, it is no longer free 300 incoming minute. Once you spend or recharge up to N5000, you will get the offer the next day.
You can use the offer in the eligible destinations with their preferred roaming partners: Canada Wind, TELUS or Bell; France Orange or SFR; Italy H3G or Vodafone; Kenya Safaricom; Saudi Arabia Mobily or ZAIN; Turkey Vodafone; United States of America AT&T; Germany T-Mobile or Vodafone; South Africa MTN; Spain Orange or Vodafone); Malaysia Maxis and United Kingdom T-Mobile, Orange, Vodafone or Telefonica O2.

Good morning Temitope, while you are abroad, you simply recharge up to 5000 within 30 days, you will qualify for the free 300 minutes for your incoming calls and ensure you connected to the preferred roaming network.

You can get the 100 free incoming roaming minutes by spending or recharging N5000 and above.
Free Incoming Roaming Calls are rewards for Prepaid and Postpaid customers who have spent or recharged up to N5000 on the MTN network.
You will be rewarded with up to 100 free incoming minutes while roaming in some selected destinations such as Canada, France, Italy, Kenya, Saudi Arabia, Turkey, United States, Germany, South Africa, Spain, Malaysia, United Kingdom over our preferred network.

In other words, this can be used to receive free roaming calls when you are outside the country and in one of the eligible countries above as well as latching onto our preferred network.