Tata DoCoMo offers talktime and 1GB 3G data at Rs. 250

Tata DoCoMo has announced the introduction of a special offer under its existing 3G SmartLife Plans wherein customers can get free 3G data for just Rs. 4.

Tata Docomo logo water 

Now Tata DoCoMo users, who opt in for the recharge of Rs. 246, would get a talktime of Rs. 219 but if they go ahead and recharge for Rs. 4 more, then they are in for a treat.

 
Under this offer, when Tata DoCoMo users recharge for an additional Rs. 4, within 48 hrs of recharging with Rs 246, they would get 1GB 3G Data usage valid for 30 days in addition to the talk time. The validity of the talktime is as per core account validity of the subscriber.
 
Users who do not wish to opt in for the Rs. 246 recharge, they can independently opt for the pack of Rs. 4 which would give those users 4 MB of 3G data usage with 3 days of validity.
 
The recharge of Rs 246 plus Rs. 4 is indeed a treat for Tata DoCoMo user as they get talktime and 1GB of 3G data too, but then we do not understand the use of independently opting for the Rs. 4 data pack and use 4 MB of 3G data.
 
What happens in 4 MB of data on 3G these days?