This is the the reason i didnt opted for jio...I also got few phone calls for opting the jio sim but i didnt go with it as i had bad experience with them...My mom is using Rel.2g card...I brought that some 7-8 years ago..The only reason is its callrate is exceptionally well..1Rs. for 3mins at that time..now it is Rs.1.20 for 3 mins. still cheap..Also i got 1 free sim card along with it which i gave to dad..But within few days my parents started facing unnecessary cost/balance cutting problem..As they started applying some unnecessary services on their no. like callertune, cricket pack etc..And every time i have to fight with CC and nodal to get the money back..I literally fed up with that..Then i applied DND on both phones and also waited for MNP..After the arrival of MNP dad ported to MTNL...Mom still using rel. but not facing any problem due to DND..i have myself noticed their t&C getting charged every 2nd day. i have no trust on Ambanis ever. Once they have sufficient subscriber base then they will show their true color.