All you need is to tweak your Android imei with any of the analyzed imei below,
Once you succeeded in tweaking, wait to receive a 100% bonus message for 6 months, just as it shown in the screenshot below;
Change the last 3 or 4 digits, if the imei listed above did not give you positive response.
After that, migrate to beta talk by dialing *123*2*6# or text BT to 131.
Now, subscribe to any MTN data of your choice with *131*1# and you will be giving double of the data you bought.
Use *559*2# or 2 to 131 to check your data balance.
If you cannot tweak with a Samsung phone, try putting your sim in a Mediatek phone like Tecno or Infinix and follow the procedures above and tweak with Mobile uncle, then insert it in your Samsung device back
With this, you should have double of your data purchase valid for 30days.
Note that the double data offer will be for duration of 6Months,