Well guys, I've been using this way of surfing for the past couple of months...
Trust me, it's not worth it. Even if it's not expensive, there is a greater problem - you never know WHEN data services will be withdrawn.. sometimes it happens barely a couple of hours after you recharge, and you might end up using up 2 or 3 RCVs in a day if what you're doing on the net is important to you. What's worse is when you really need to access the internet, and you recharge, it might not re-activate RConnect instantly. It has taken me as long as 8 hours to activate. There's no pattern.
Infact I just applied for a post-paid phone with platinum plan.