This Is Not A trick But Can be Used As a Trick For Free Hellotune Iam using This about 3 months.....
1: Keep Your Balance 2 rupees or 3 rupees(it will deducted for HelloTune)
2:First U call 578785 for activate the hello tune. Then it will deduct your balance and hello tune will be activated instantly for 6days....
3: after 6 days it can be deactivated so u should change ur Tune everyday by doing Step 4.
4: Sms required Song or song Name by Message..
sms Tune name/film name to 543215(u can change ur hellotune for unlimitted times a day).
5: By doing step5 the Hellotune will be stay everyday with you.
6: it should be noted that if u Recharge Your Sim it will be deducted. so deactivate Hellotune By Dialing *121# before Every Recharge.....
7: If u want A series Of Random(up to 15 songs) songs then just Go the Link below through OPERA.
Set Random Hellotunes upto 15 songs