How Can I Stay Under the Radar Using Company Wi-Fi?

Hey everyone, I'm kind of tech-savvy but have a specific concern about using company Wi-Fi that I really need advice on. I work shifts that can go up to 12 hours, and I need to stay reachable by my family, so I've teamed up with a few coworkers to share a monthly Wi-Fi package since access isn't free and most employees wouldn't pay for their own. We're careful to use it only during breaks, but recently, the company started offering limited free Wi-Fi tied to membership numbers, and some people have been caught improperly accessing it. The company has warned that this could lead to termination, which makes me nervous since I'm using my shared package and connected during my break.

I know they might notice the different devices connecting to the same account since some days it's my phone, other days it's my laptop, and occasionally a coworker's device. Right now, I've randomized my MAC address and hidden my device ID, but I'm worried they might still track usage back to me, especially since I'm using an app for work that could also pull device info.

I want to avoid any potential issues and keep my Wi-Fi use as low-profile as possible. What other steps can I take to stay under the radar? I'm mainly using an Android phone but also sometimes connect with a Windows laptop. Any help would be appreciated!