Can't answer this one myself. As I have data sim plan from mobile provider -2gb+100 text messages. When I use lte only for iPad Pro data connection by switching off wifi -I can see how much data I have used from 2gb -simple e.g. some Skyq t.v. This morning used .15gb of data -1.82gb to use until next billing time. The 100 test messages is always 100 to use with 0 used though I did once see one or two used. When I send a text from iPad Pro using lte only -should this deduct from my 100 test messages as I don't think it does.