it seem my 2014 lexus RX does not have a remote starter function... was this optional on the rx? if so how much does it cost to get this installed?

 

Yes, remote starter was an option.
If you want to add remote start, consider going with DEI product (Viper, Python, etc) instead of Lexus-installed system. Much better product!
At independent installers, remote start can be added from about $350 and up depending on model of the system

 

I will have ATT mobile internet in the 2014 RX 350, usually connected through diagnostic port (OBD). The Mobley unit can provide internet continuously, are there remote starters that can take advantage of that to give unlimited range to start? If not, are above recommendations still standing for long range remote starter?