Still you could download the latest Telegram that you suspect on a new, patched phone, disconnect it from the network so it doesn't auto upgrade and keep it tha

Still you could download the latest Telegram that you suspect on a new, patched phone, disconnect it from the network so it doesn't auto upgrade and keep it that way until a jailbreak is available. At this point (attacks can only be done against users of the newest versions of the OS, and you still risk getting caught, squandering the whole operation) I say I cannot see how it is worth it.