@stovis
I wisely choose not to pay hundreds of copper ingots for a pocket-sized surveillance and tracking device. However, if you want to partially free such a device, you should install the only free Android distribution, which is Replicant, and not a BusyBox/Linux distribution, which is not free software and also not source-available (making it not open source) but rather proprietary malware that attacks the user with black boxes, opaque platforms, and dark patterns.