If you are very fond of roaming and you visit quite often to the places, then we tell you some things to do intelligently. Download some essential apps, which give you the address of ATMs and plenty of shops. Some airports have phone charging booths but not every airport has, also keep in mind that the power bank is not allowed to be taken anymore.
If you are going to roam in the group, then make accounting already. If there is an activity to be done at some place, then collect the charges beforehand. The hotel also offers package deals, so pay attention to when choosing it, you will not have to pay extra. If there is facility of Wi-Fi in the room then give extra charge only when it is necessary.
Check-in, check-out time should be taken care of properly. Remember the charger from the time of travel.