BetterRoaming does not offer an eSIM for Hungary that includes a phone number or SMS capability. All of its Hungary plans are data‑only, so travelers will not receive a local number or the ability to send text messages through the network.
They do, however, sell data plans that allow the use of Internet‑based messaging and calling services such as WhatsApp, Telegram, and iMessage. Those VoIP apps can generally be used over the data connection, but some destinations may restrict or block particular applications, so travelers should confirm that the services they need are accessible in Hungary before purchasing.