If you own an Android smartphone and stay with it abroad or close to a country border, you may want to know if you are already logged in a cellular network, which causes roaming fees.
In Android it is fortunately very easy to see whether you are connected to your Home-Network or another network. This is a directly displayed in the status bar. If you are in a network with roaming a little R is displayed in the status bar. This R stays for roaming and shows you that you are connected to a roaming network with the Android smartphone.
You now know how to quickly and easily seee on an Android smartphone whether you are logged in to a roaming mobile network.