I have a Python script that relies on Telethon to verify whether a phone number is linked to a Telegram account. In its current state the success rate is frustratingly low—numbers that I know are active on Telegram are repeatedly flagged as “no account”. My own diagnostics are limited: logging and error-handling are only partially implemented, so I’m still guessing whether the root cause is rate-limiting, subtle response-parsing mistakes, or intermittent network hiccups. What I need, quickly, is a rock-solid solution that: • Accurately detects the presence of a Telegram account for both domestic and international numbers. • Includes clear, structured logging so I can trace every request/response cycle and spot any future anomalies without extra coding. • Handles exceptions gracefully, retries when appropriate, and respects Telethon (and Telegram) limits to avoid bans or throttling. I’ll share the current repository, API credentials, and sample datasets the moment we start. Once your fix is in place I’ll run a benchmark against a large list of verified numbers; the result should show only the unavoidable false negatives typical of Telegram’s own look-ups. A concise README describing the new flow and configuration parameters will complete the job.