I have a Nexus 5x by LG and a 1 gb plan. However, my SMS won’t work when I am offiline and the data plan is off. My husband does not have a data plan and his SMS works fine. It seems it is better to pay less and you get more!!
SMS requires that data be turned on. The data used for SMS is not counted against your data allowance.
Text Messages (SMS)
Our phones, like all phones, need some kind of connectivity to receive a text message. We require a cell connection or WiFi access to the Internet to receive text messages. Once you are connected to cell or WiFi, you will receive your message.****
**If you have mobile data or data roaming disabled, you may experience issues with calling or texting. See Check Network Settings or Check Network Settings (KitKat) for instructions on making sure mobile data and roaming data are enabled.
Note: Data roaming is only available on Republic 2.0 Plans.
more precisely Mobile and Roaming data needs to be left on in the Android setting for Texting to work on 3.0, Cell data can be turn off in the Republic app with out issue.