SIM7020 behaviour

Been tinkering with a SIM7020E module. Connects to LTE network automatically (& has network led to indicate it’s done so), does http GETs without having to use micropython’s urequests lib, was looking promising till we sent it an ‘AT+POWD=1’ cmd. Module now echoes AT cmds but no longer acts on them.

Still auto connects to LTE, 5mA current draw is consistent with connected/idle just won’t do anything except echo AT cmds. We’ve tried pulling various pins low in an effort to get a hardware reset but no joy. Any thoughts on how to unbrick at SIM7020?