Yes sir I am aware of the 2G GSM network still in existence, my friends Alarm System utilizes 2G GSM so when it comes down he might have to replace his wireless module at a cost.
Instead of hoarding (collecting) all my old phones, I decided to give them away to less fortunate people who could use them, so I sent a few of them over to Africa provided the frequencies were compatible, so the less fortunate people over there could have a basic working phone for free. and in those parts of the world phone networks are not as advanced as over here so they still use older 2G and 3G technologies for years to come.
I probably owned one CDMA phone in my whole life, and I was able to repurpose it by giving it to a family member in need of a working phone back in the day. I feel good that it was put to good use cus now that the network is decommissioning the phones will be useless and possibly broken and worn out.