I have released a first version of the field test / network monitoring application for Android 7 (Nougat) devices. With this app, you will be able to collect xARFCN data from the network and know which frequency band your smartphone is using.
Recently I had a flight to Singapore on a SilkAir plane equipped with free Wi-Fi on board providing a streaming access to a selection recent movies, TV short features and some music for all passengers, but no access to Internet which is the very costly part in an airplane. SilkAir is the short-haul carrier of Singapore Airlines which operates a fleet of Airbus A320 and Boeing B737-800 aircrafts.
I started to develop a FieldTest application for Android that I will publish on Google Play for everyone to use. I wanted to do this because of the frustration of not being able to find an app that is both eye-candy and reports useful information from my network.
Recently I discovered that Android N (7.0) provides a new method getArfcn() to get the Absolute Radio Frequency Channel Number, which gives you the exact frequency identifier that is used by the mobile phone on 2G (ARFCN), 3G (UARFCN) or 4G (EARFCN).