Napco's updated StarLink™ 3 Future-Proof Universal Radio Series can be upgraded anytime there are progressions in cell networks, from 2G to 5G to xxG, down the road, without ever replacing the radio.
Like its predecessor, it still features universal full primary or backup event reporting from any panel brand to any Central Station and requires no special equipment. Also with Napco’s popular StarLink App for Apple/Droids, remote-enabled accounts can arm/disarm their system from their smartphones or tablets. Lastly, StarLink’s Takeover Feature enables it to easily capture any panel’s existing CS phone number, so you can reroute/redirect it to another central station. SLE-GSM3/4G includes an AT&T Sim card for use with AT&T direct service "AT&T PLUS" and benefits from its large service footprint (It comes preactivated and has no radio activation fee). Napco’s supgradable StarLink 2 SLE-GSM is still also available thru distribution, and uses T-Mobile™ Service.
More Info: http://www.napcosecurity.com/starlinkgsm.html