MTN 3GB Tweak

Send CARE to 5018. It's free, then download the app from the link that will be sent to you.
Get your id and pin number, Login, then go to Data Services>Simple Surf>Buy Simple Surf.Tick the 100HRS 30-Day Data Option and Click 'Subscribe to this Service'
You would receive an SMS telling you you've gotten 3GB

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Simply text 100H to 131...same tin...dats faster...free too

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Get a nokia torch light phone put Your mtn sim change the
date to 2.08.2013 and send rest to 131

After that send 100H TO 131 15times wait 4 30mins u got a
reply that

.
.
.
WELCOME TO 100HRS DATA PLAN YOU HAVE 3.0GB
REMEMBER FAIRLY USAGE
POLICY APPLIED.. . . .
EXPIRED ON . . . 02.08.2013

This Tweak was confirmed working By me, and it was
tested on 4 MTN Sim card so it
Must work for You if you follow Above Steps....