Who I have the same questioned this topic

I have read several threads in which community members have asked about texting via their tablets.  I've seen responses marked as "Correct responses" that are not entirely true.  Don't let verizon or the armchair "experts" fool you.  Many current tablets have been designed and built with the necessary hardware capable of making regular voice calls and SMS (texts) with your regular phone/SMS/data smartphone plan SIM used with your tablet.  Verizon has chosen to prevent you, via restrictive firmware/software, from utilizing these features that were designed and built into your device by the manufacturer.

If you have a tablet plan, then yes, the plan does not support regular voice calls and SMS; however, don't be bamboozled by verizon or others when you are told that you must have a tablet-specific plan for your tablet.  You are being lied to.

I have unsuccessfully attempted to resolve this issue on my now three year old tablet (https://community.verizonwireless.com/thread/921688 ), but the issue still applies to many of the current available tablets.