Already the 2nd unit is defective within 6 months

I'm still amazed by the small device designed for use in mobile homes up to 12 volts, although already the 2nd at 6 months and each about 10 weekends uptime no longer passes the antenna signal.
I've even ordered a third, because it is so easy to operate and install. Nevertheless, I am disappointed because our vorherigs Nokia has kept under the same conditions 12 years. Schade ansich. Still good that Amazon the warranty claims must be handled easily. New Device ordered so little downtime is there. Altes sent back and so far receive immediate credit. So problems of retailers is not usually. - In spite of the problems (first) always happy.