Just so, what do the arrows under 4g mean?
The up arrow means it's uploading, and the down arrow means it's downloading.
Secondly, what do icons mean on Android phone? Android phones, as well as most Android apps, feature common icons. These symbols work as buttons on the touchscreen: Tap an icon to perform a specific task or action. The icons are quite consistent between the various apps you use.
In respect to this, what do the arrows mean on my phone?
Two rectangles with arrows in themThis symbol shows that Android Beam is turned on. This works with NFC to transfer files from one Android phone to another wirelessly and quickly. It can be turned off in the 'Wireless & Networks' settings menu.
What are the 2 arrows on the top of my phone?
Two Horizontal Arrows IconThis icon means that if you have mobile data usage enabled, the network behind the data usage is using LTE services, more importantly VoLTE (Voice Over LTE). It is basically using 4G to make voice communications, similar to what VoIP (voice over IP) is.