Telegram needs access too let you connect with friends across all your devices, your contacts so that you can connectwill be continuously synced with your friends across all your deviceTelegram's heavily encrypted cloud servers.
permissions
147
Para que puedas comunicarte con tus amigos en todos tus dispositivos, tus contactos se sincronizarán continuamente con los servidores en la nube fuertemente cifrados de Telegram.
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Agustín Volpe,
Dec 11, 2018 at 23:46