I recently got a comment on my blog about tips and tricks to hack mobiles which will let people get free sms or gprs or even free talk time from all the major providers. But the site mentioned in the comments was password protected and the person wanted you to recharge his phone to get username and passwords to get into the site.
Seriously this is the guy who will provide you free sms or gprs or even talk time but he himself asks for recharges from people.
I strongly advice people not to fall for these tricks even if they have some hacks be very careful using them.
The mobile service providers ask all the details like address proof and photos for a reason. And don't forget they have all these details about you. And its very easy for them to track you down and make you pay.
So don't try these unless you really want to get into trouble.