NS4G Hotspot Hack

[NexusS4G27]

Sometimes when enabling Mobile Hotspot 4G will stay on and pass data to Wi-Fi devices even though hotspot is not paid for.
Does this affect add any cost to the billing if used without paid for.
If it doesn't then I'll take advantage on last android update.
Android 4.1.1 Not Rooted
Nexus S 4G Sprint
Posted via Android Central App