Hi Imaobong, MTN has device financing service with different packages, it depends on the one that meet your interest.
Below is just one of the package, there others with range of devices. You need to visit any MTN shop closer to you to purchase the device.
Inspire U5 Plus Bundle + Nokia C1/Itel A37/ Tecno Pop5 Go/ Tecno Pop2F.
Features: 1GB / 16GB / 3G - 4G /2200 - 4000mAh / 5 MP / 2 - 5MP
The Offer 1:
Option 1: No Upfront Payment. Monthly subscription of NGN7,000 over 12 months
Option 2: N9,000 upfront payment. Monthly subscription of NGN7,000 over 9 months
Option 3: N18,500 upfront payment. Monthly subscription of NGN7,000 for 6 months
•4GB of Data every month
•100mins of Voice calls
•Smartphones ranging from Nokia, Itel and Tecno