I got the bill now (for December 2018). I was on 249 plan for a few months. The plan was changed to 299 on or around December 1, 2018, automatically by BSNL. Now, I checked the bill to find that I was charged only 249 + taxes.
The FUP limit is the same. But, 300 free calls to other networks seems to be cut-off as I was charged Rs 7.2 (+ taxes) for calls to other networks.
Anyone else with similar bill (249 + taxes)?