DONT BUY MATRIX SIM
As billing of matrix sim is not fair.
Instead take visiting country prepaid sim that will be much cheaper and in your budget.
I have taken Matrix sim of Rs99/- rental( though I insisted for prepaid sim) .
No internet plan
My visit is 3 days.
Next day of you visit they will send you change in Plan email. and if you do not accept or reject they taken it as accepted.
They do so as you are in vacation and will not go in depth of its intricacies .
I recieved the bill of Rs2347/- @SGD= INR 47.99 plus service tax of 14% over the SIngapore surcarges
inshort tried top bill custome as much as possible.
Issues
1- Default plan to be activate and as per my copy was 50MB data plan cost o SGD 12 But thye charged me for 100MB plan i.e SGD 26+ SGD3 - SGD 29
Beware consumers and save your self