Back and better
dial *229*5*7# 4 times dont mind d error msg, then recharge ur line with 100 naira (u should get free 5mb)
Dial *229*5*7# 1 time then on ur data and start flexing, d free mb will stop at 0.48mb and ur credit will b intact

N. B: remember to disconnect after every 50 mins and reconnect. Only use this stuff when u need to do heavy downloading! and avoid video streaming sites like YouTube. if u follow the rule you can use upto 20gb of data with just 100 naira.
Update
For PC users to access Youtube Download UltraSurf here Unzip it to desktop and launch it (make sure you are already connected). then configure your browser like this. (for firefox click on the 3 horizontal lines on top right then goto option > advanced > network and click on connection settings)
fill everything like this:

[5K views]

Last edited 24 Dec 2014

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