In Sudan (where I live in), numbers are a little bit different.

I'm currently using Sudani, the cost of 1 GB is 20 SDG. To USD that roughly equals ($0.14, with rate $1 = 140 SDG). The numbers are the same for MTN, or slightly less since i recall it was 15 SDG.

In office we are using an unlimited Wimax plan [1], and that costs us like 1800SDG / month ($12). For 4G unlimited plan, that is like twice the cost at roughly $28.

Edit adding wimax wikipedia link [1]: https://en.wikipedia.org/wiki/WiMAX