This is how you can get 300mb without any stress atall
Get a new mtn sim that you have tweak on before or a 2go sim and get an mtk phone that you can use to tweak
Tweak the imei below and after successful tweaking reboot the phone and wait for a message that state 'Thank you for activating your sim on mtn you free data will be sent to you shortly' wait a little more you will receive 300mb but don't send any message to 131 ooo
Take the imei
358470062567603
Don't 4get to change last four digit of the imei and if you don't receive any message after successful tweaking change the imei again until you receive the message
To check data
*559*22#
If you don't know how to tweak it is better you browse goggle on the information please note that it is tested as at today