Hello, could you see why personal hotspot on iPhone 6 and 6+ works in the standard g to 54 Mb/s , iPhone 5 and 5s works in the standard n to 150Mb/s. When I use the iPhone as a modem via the cable I have the same maximum speed as directly on the iPhone around 70Mb/s when I use WIFI hotspot this speed is about 30Mb/s. How is it possible that an older model iPhone and iPad has better performance? Please help me resolve this problem.