Many new 4G/LTE networks are now available on OneSimCard Plus, Data & Roam and Europe & More. The view the network speed available in the countries you are traveling to, please go the Rates and Coverage page, then select the country you are traveling to and the type of your SIM card. Then scroll down the page to the View Roaming Network Details link and find 4G / LTE network availability.
Now both OneSimCard Data & Roam and OneSimCard Europe & More offer 4G speed in many countries. For coverage details please visit: www.onesimcard.com/cell-phone-rates/