Since the new firmware update of the Telo TE 390 you might encounter problems installing apps on the device. This is because it has been locked by the manufacturer.
By entering *#*#1122#*#* in the dial pad (and press dial) the device becomes unlocked and you can install apk’s on the device.
Another Network Radio out of my favourite devices list:
the Tele TE-390.
Again from the Telo family, this is a very robust and compact device.
Nice and clear display with bright letters. The battery life on this one is phenomenal!