[MC60] How to cancel and AT command

I was testing a intentional network loss while executing AT+QIACT by removing the antenna. It seems the command blocks the serial interface indefinitely and I am not able to send any other AT commands. Is it possible to cancel any previous command that blocks the serial interface. (On EC20 I use hardware reset pin and start over).
Thank you

Dear Hellraise,
Thanks for your inquiry in Quectel forum.
Please note that maximum response time of AT+QIACT is about 150s, you just need to wait for the return result, can not send AT command within waitting time. There is no method to cancel it. Thanks!