I've been using my Moto X Pure on Cricket since early October with no issues. Even upgraded to Marshmallow and it works great on Cricket.
So you didn't have to configure any APN settings?
Usually the SIM will do that -- but if you do the APN settings for Cricket are at the link below.
https://www.cricketwireless.com/sup...ice-byod/customer/bring-your-own-android.html
I just set mine up today and it was automatic. I just inserted the sim card and boom.
P.S. something funky is going on with MMS messages while Wi-Fi is turned on though.