description: Settings used by telegram servers for sending the confirm code.
Example implementations: [telegram for android](https://github.com/DrKLO/Telegram/blob/master/TMessagesProj/src/main/java/org/telegram/ui/LoginActivity.java), [tdlib](https://github.com/tdlib/td/tree/master/td/telegram/SendCodeHelper.cpp).
Settings used by telegram servers for sending the confirm code.
Example implementations: [telegram for android](https://github.com/DrKLO/Telegram/blob/master/TMessagesProj/src/main/java/org/telegram/ui/LoginActivity.java), [tdlib](https://github.com/tdlib/td/tree/master/td/telegram/SendCodeHelper.cpp).
|allow\_flashcall|[Bool](../types/Bool.md) | Optional|Whether to allow phone verification via [phone calls](https://core.telegram.org/api/auth).|
|current\_number|[Bool](../types/Bool.md) | Optional|Pass true if the phone number is used on the current device. Ignored if allow\_flashcall is not set.|
|allow\_app\_hash|[Bool](../types/Bool.md) | Optional|If a token that will be included in eventually sent SMSs is required: required in newer versions of android, to use the [android SMS receiver APIs](https://developers.google.com/identity/sms-retriever/overview)|