I wrote a post about how to bundle or convert your cedis credit( airtime) to megabyte-MTN--Ghana which help reduce data cost. MTN network has move step ahead. The network is up with product titled "data transfer" whereby your friend can transfer data from his/her phone to your phone.You might be surfing the net and you run-out airtime and you cannot go out to buy. You can just ask colleague to transfer a data from his phone. Let me walk you through the steps.
1. Dial *138* and press send or okay
2. Choose option 8 and press send
3. Enter the number subscriber(person) you want to transfer the data to
4. Choose amount of data you want to transfer from the options
5. Press ok