If you need a mobile Internet abroad, we recommend buying a SIM card of a local provider. If your smartphone or tablet supports 4G network It is better to get a card with 4G LTE — as a rule it provides faster Internet connection. You can check the user guide of your device but In fact, most of modern devices support 4G.
The best in traveling —to have a phone with 2 SIM slots. You can keep your SIM card only for calls with turned off Internet and use the SIM card of the host country to get the Internet and make local calls.
Important! Be very attentive to the Internet when roaming because a smartphone can use a lot of traffic in the background to update system and applications.