What is eva calling card?

"AiHuaPhoneCard" is a calling card that provides international roaming and long-distance calling services. "EVA" may be a Chinese abbreviation based on "Aihua". Aiwa calling cards are usually used for international travel or long-distance calls. They are used together with mobile phones. This calling card can provide international roaming service, allowing users to make phone calls, send text messages and surf the Internet overseas.