BSNL has revised its Rs 666 plan once again. This is the second revision of the plan in less than two months. The company has increased the per day data benefit of the plan from 2GB to 3GB data per day. But there's a catch. It is only a limited time offer. The users can avail the 3GB data per day benefit only till December 31, 2019, after which the benefit will reduce to 2GB data per day.

BSNL Rs 666 aka Sixer plan was recently modified to offer free voice calling to MTNL numbers. MTNL operates in Delhi and Mumbai circles where BSNL is absent. The BSNL Sixer plan previously offered validity of 122 days and now after the latest revision, it comes with a validity period of 134 days. The users now get 3GB data per day for 134 days which totals 402GB data for the entire validity period.

Along with the data benefit, the BSNL Sixer plan now offers free voice calls benefits capped at 250 minutes per day. According to the TelecomTalk report, the revised plan will come in effect from December 23, 2019, i.e. from today.

BSNL recently also launched a new Mithram Plus plan at Rs 109 for its users in the Kerala circle. The plan offers an account validity of 90 days along with unlimited voice calls to any network in India including Mumbai and Delhi circles with a capping of 250 minutes per day. There's also 5GB of data benefit included in the plan.

BSNL has revised several of its plans in the past few weeks. It recently also revised the validity of its four prepaid plans - Rs 118, Rs 187, Rs 349 and Rs 399. The company has cut down on the validity of these four plans with the rest of the benefits remaining the same. The Rs 118 BSNL prepaid plan that previously offered 28 days of validity now comes with 21 days of validity and offers unlimited calls, 0.5 GB data per day, and 100 SMS per day.

The Rs 187 prepaid plan now offers 24 days of validity instead of 26 days with unlimited calls, 3 GB data per day, and 100 SMS per day. The validity of Rs 349 prepaid recharge has been reduced from 64 days to 56 days. The benefits include unlimited calls, 2 GB per day data, and 100 SMS per day. Last but not least is the Rs 399 recharge plan that now comes with 65 days of validity instead of 72 days. The benefits are- unlimited calls, 2 GB per day data, and 100 SMS per day.