USE LOCAL SIM CARDS:

Roaming fees are like an ominous and pending threat looming over any trip. How much will checking email cost? Will I be charged $5 (Dh18.36) to look at Google Maps? Get a local SIM card instead, if you can. SIM cards are available virtually everywhere you might travel. You may even find them in vending machines or kiosks in the airport, although those will likely be more expensive than one you’ll find once you get into town or closer to your hotel.