The steps are very simple. Just dial *#61# on your phone. It will show either line forwarded or not forwarded. If it shows Call Forwarded, that confirms that your phone number/line is being monitored! If it shows Not Forwarded it means you are safe.
If it is forwarded, simply dial ##21# to remove the “monitoring device” from that phone number/line. Yipeee! You’re now secure. No secret security agent can monitor your line again, ever. We are not under military government or in a police state.
Be sure to do this for ALL your phone numbers and lines!