I used this operator for few day because its grand offer, unlimited with vodafone mobile calling free only this number which starting with 80016×××××.
When I call anyone it charges normal cost but when I call 80016×××××× number with adding 1 ( ex-180016××××) it dose not any charge for calling.
After 3month it is totally gone, can’t make any call for free. I don’t know how to activate this offer , my friend said it is system fault. anyway, it is very amazing. I really like this.