/**
 * Normalizes a phone number to E.164 digits (without leading +), returns null for null input.
 * @param value - The raw phone number value.
 * @returns Digits-only E.164 string, null for null input, or undefined if invalid.
 */
declare function normalizePhone(value: unknown): string | null | undefined;
/**
 * Formats a phone number in international format for display.
 * @param value - The raw phone number value.
 * @param defaultCountry - Optional default country code for parsing.
 * @returns The formatted phone number, or undefined if invalid.
 */
declare function formatPhoneDisplay(value: unknown, defaultCountry?: string): string | undefined;

export { formatPhoneDisplay, normalizePhone };