I have one of these https://www.amazon.com/gp/product/B09NDDH6S8 which is easy to change. You still need some knowledge to run some AT commands on the modem. It's easy to find the instructions online and it can be done from the web based admin. Yes, they have AT commands like old dialup modems.
Anything from https://thewirelesshaven.com. I have an old one of their routers and the latest firmware literally has IMEI as a textbox in the admin.
Anything from https://thewirelesshaven.com. I have an old one of their routers and the latest firmware literally has IMEI as a textbox in the admin.