Hello! I can’t find authenticators (6 digits) in Blizzard shop… And I can’t find authenticator apps for phones like these (Nokia 105 2017 and even the new Nokia 3310). Haven’t I another choice but to buy an Android or an IPhone??
Unfortunately those Nokia phones are rather classic and not exactly smartphones such as the Nokia 5. And not supported by the Blizzard Mobile Authenticator, which you can download from the Google Play Store or App Store.
If you wanted a Blizzard physical authenticator, you’ll have to find them at gaming retailers or at digital shops. They may have them in stock or you can order them in. The EU Blizzard gear store doesn’t have them.
Alternatively, if you want to enhance your security you may still add a phone number to receive text message notifications: https://eu.battle.net/support/en/article/000026824