If you were in an Unlimited Plan before migration, then ensure that you keep your usage in check. Reliance has converted UNLIMITED Plans to LIMITED Plans after migration and also their speed reduction software is not working correctly, resulting in Bills in the range to 4000 to 72000! Also read this http://www.punemirror.in/pune/civic/Furious-customers-knock-on-Reliance-door-after-hefty-bill/articleshow/53308609.cms