FYI for anyone struggling to utilize cloud with this device. AT&T will, these days, provide you with a 5G SIM card. It WILL NOT work in your device and you must use a 4G Data Only card, which are being phased out. They had a returned sim and it was the only one left. Beware these probably will not be a viable option if cloud view via SIM is your need (using AT&T).
DR750 2CH LTE AT&T SIM ISSUE (4G ONLY)