Docomo gprs validity trick 100% working

With this trick you can use the additional mb you recharge till the validity of your old mb
ex you recharge with rs 69 and you get 2.5 gb internet for 1 month
now if your mb gets over in 15 days(or less or more) just recharge with rs 5 and you will get 50 mb valid till the expiration date of that 1 month recharge that means you can use your 50 mb till the remaining days,
(you can recharge with any other gprs pack instead of 5 ex 15 will give 500 mb)
100% working for me

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