It’s simple: just multiply the number of months remaining on your contract when you break it by 2 GB /mo.
For example, if you decide to porting-in your line to Circles.Life when you still have six more months to go with telco X for this line, you will get 6*2 GB = 12 GB /mo Break-up Bonus Data until June 2017, and then 1 GB /mo forever. If you still have three more months to go with this telco, you will get 3*2GB = 6 GB /mo Break-up Bonus Data until June 2017, and then 1 GB /mo forever. The earlier you come, the more Data you get!
Please note that the Break-up Bonus Data you can get is capped at 12 GB /mo, which corresponds to six months remaining on your previous telco contract when you port-in. If you got seven months left or more on your contract, you will still get 12 GB /mo Break-up Bonus Data until the end of June 2017.
The Contract Break-Up Campaign ends on January 31st, 2017. You missed it? No worries, we got your back! Get 2 GB /mo Bonus Data when you port-in to Circles.Life starting from February 1st onward! 1 GB /mo will stay till December 2017 and 1 GB /mo will stay forever.