Sorry ,not the ''mad'' tester here and not a network-tech-nerd either,+ , not in an urge to travel to 5 G aera to report any success . It look like i live in an inbetween towers place , its switching often from 2G to 3G, ha ha , which my son, an android user with more phone experience says ;both does not exist anymore !!?! Cough cough , dont try to educate us , we will figure it out one day .