Baat Barkarar — "the talk stays on" — reminds you before the validity of your prepaid mobile, DTH or data plan ends, so your conversations never break. You recharge with your operator, as usual. Free, from Patia, Bhubaneswar.
Illustrative example
Nickname each SIM, DTH or data pack.
Validity counted day by day.
7, 3 and 1 day before.
Free. Name and email only.