Some of the best MTNL 3G prepaid internet plans include offering 1.5 GB data per day for 28 days with unlimited STD and local calling and 100 SMS/day. This recharge plan is priced at Rs. 171. Another MTNL recharge plan is available at Rs. 231. It provides 2.5 GB data per day with STD and local calling and 100 SMS per day. Last but not least, it also has a 3G internet plan that offers 3GB data per day along with unlimited STD and local calling and 100 SMS every day with the recharge of Rs. 421.