MTProto proxy — Telegram's exclusive anti-block weapon
**MTProto proxy is Telegram's original anti-block mechanism** — no other social platform (Facebook / Twitter / Signal) has a comparable design. How it works: Telegram's transport protocol is MTProto (Mobile Transport Protocol, built by Nikolai Durov, 2.0 released 2017), inherently encrypt + compress + multiplex. MTProto proxy points users to a third-party 'relay server' (running MTProto proxy software); the app's traffic tunnels through the proxy to Telegram datacenters, and the proxy only knows you're connecting to Telegram but not the content. Key: **MTProto proxy is built into the app, no extra VPN software needed** — Chinese users go to Telegram Settings → Data and Storage → Proxy Settings, fill in proxy address + port + Secret (64-char hex key), seconds to activate. MTProto proxy traffic patterns differ from normal TLS (random bytes + MTProto secret auth), harder for DPI to identify than HTTPS proxies. Public proxy sources: GitHub projects like awesome-mtproto-proxy aggregate volunteer-run global free proxies; paid proxies found in Reddit r/Telegram / Chinese forums / QQ groups. Note: public free proxies are unstable (IPs frequently added to GFW blocklist); heavy users should self-host (VPS + mtg / mtproxy open-source server).
Hard-block status — mainland China + Iran, Russia unbanned
Telegram's hard-blocked country count is very small, unlike 10 years ago (Facebook / Twitter hard-blocked in 7-10 countries). **Mainland China**: GFW has persistently blocked telegram.org + web.telegram.org + api.telegram.org core domains since 2015, TCP 53 DNS poisoning + TLS SNI interception. Native app direct connection completely fails, must use MTProto proxy or commercial VPN. **Iran**: 2018-04 Iranian government banned because Telegram wouldn't localize data (stored in Russia or within Iran), oscillated since — tightened after 2019 Malaysia blocking IRGC hacker incident, intermittently open 2021-2025 (per government mood), fully blocked during Mahsa Amini protests (2022-09), eased under the 2024 moderate government but still unstable. **Russia**: fascinating case — 2018-04 Roskomnadzor banned Telegram (Pavel Durov refused to hand FSB encryption keys), Telegram mobilized Google / Amazon IP pools (hundreds of thousands of IPs), rotating whenever batches were blocked; Roskomnadzor blocked 18M+ IPs between 2018-2020 but couldn't catch up — even official government agencies started using Telegram, finally Russian government announced unban 2020-06-18 — a **classic case of failed great-power block**. Post-2022 war, Russian government became more reliant on Telegram (official channels + military comms), never re-banned.
Channels / Super Groups / Bot — more than just IM
Telegram's biggest product difference from WhatsApp / Signal isn't encryption, but 'one-to-many broadcast' capability, making it both IM and social + media platform. **Channels**: creators or brands can open channels, subscribers receive pushes, one-way broadcast (subscribers can't comment by default, optional to enable), no subscriber cap. Many important information sources worldwide distribute via Telegram Channels — official channels of both sides during Russia-Ukraine war, tech-industry figure channels (early Tim Cook, Vitalik Buterin etc.), news-agency channels, luxury / niche-goods channels (OnlyFans-style content alternatives) all on Telegram. **Super Groups**: up to 200,000 members, supports anonymity, tiered admin permissions, topic classification (2022 new feature); halfway between WeChat groups (500 people) and Discord servers (text + voice). **Bot**: official Bot ecosystem; developers build automation via the API — weather bots, translation bots, game bots, AI chat bots (ChatGPT wrappers), media download bots (YouTube / TikTok / Instagram downloads); bot count in the millions, Telegram's unique productivity layer. Meaning for VPN users: **none of these features have geo restrictions** — if mainland Chinese users can connect to Telegram, they can subscribe to any global channel, join any super group, use any Bot — no regional catalog differences (unlike Netflix / Spotify).
End-to-end encryption — Secret Chats vs regular chats
Telegram's encryption model is often misunderstood. **Two chat types**: (1) **Cloud Chats** (regular chats) — default mode, messages encrypted client-side then transmitted to Telegram Cloud (MTProto protocol), **server can decrypt and store** — which is why message history persists when you switch devices. Encryption is 'server-side storage encryption + transport encryption,' **not end-to-end**. Telegram officially says server-side keys are distributed across multi-jurisdiction protection (Russia + Germany + Dubai); no single country's courts can compel Telegram to hand over user data — but technically server can see content. (2) **Secret Chats** — **true end-to-end encryption**, using MTProto Secret Chat protocol, keys live only on two devices, Telegram server can't decrypt. Limits: only between two devices (no multi-device sync), no screenshots (some platforms), self-destruct timer support. Most people think Telegram is all E2EE — **wrong**, only Secret Chats are. Comparison: WhatsApp / Signal encrypt all messages E2EE by default, Telegram only Secret Chats. If you need true private comms, use Secret Chats (contact page long-press avatar → Start Secret Chat), otherwise Cloud Chat is more convenient but trusts Telegram servers. VPN's impact on E2EE: VPN only encrypts transport layer from you to Telegram, E2EE is application layer — two orthogonal.
Telegram Premium $4.99/mo — is it worth it
Telegram Premium launched 2022-06, $4.99/mo / $44.99/year, subs exceeded 15M globally by 2024. Unlocked features: (1) **file upload limit** 2GB → 4GB (most valued); (2) **forwarded messages** ad-free + custom badges; (3) **download speed** boosted (free is throttled, Premium runs full bandwidth); (4) **emoji reactions** more types (free 10+, Premium 50+); (5) **stickers / emoji packs** exclusive collections; (6) **voice-to-text** (AI transcription); (7) **animated avatars**; (8) **chat folders** cap 10 → 20; (9) **followed channels** cap 500 → 1000; (10) **usernames** 1 → 10 (register more independent @usernames); (11) **Telegram Stars** (Premium users get monthly Stars allowance to tip channel authors, 2024 new); (12) **removes all official promotion** messages. **Worth it**: heavy users yes (developers, media workers, channel operators); ordinary users don't need it (free 4GB covers 99% of scenarios). Payment: in-app (iOS / Android) priced by Apple / Google account country, India ₹1050/year, Turkey ₺489/year, Argentina ARS 4999/year, US $49.99/year — 3-5× spread. Telegram doesn't accept mainland Alipay / WeChat Pay, must go through Apple / Google account systems.
AF3's Telegram node strategy — 1-star extremely lenient
AF3's Telegram detection is very lenient: strictness 1★, IP scoring residential 30 / quality_vpn 30 / normal_vpn 28 / datacenter 27 (same tier as Reddit / Pinterest). Probe set: (1) main telegram.org / web.telegram.org; (2) API api.telegram.org; (3) web clients webk.telegram.org / weba.telegram.org; (4) DC IP pools (Telegram's 5 main DCs — DC1 Miami / DC2 Amsterdam / DC3 Miami / DC4 Amsterdam / DC5 Singapore, app auto-selects); (5) MTProto proxy probes (if configured). Node-recommendation logic: (1) Telegram app has built-in multi-IP smart routing, **barely sensitive to node selection** — any VPN that reaches any Telegram DC suffices; (2) **European nodes** (Amsterdam / Frankfurt) optimal — Telegram DC2 / DC4 in Amsterdam, fastest origin; (3) **Asian nodes** (Singapore) fit East Asia users — DC5 in Singapore, mainland China to Singapore 80-120ms; (4) **US nodes** (Miami) fit North American users — DC1 / DC3 in Miami. **For mainland China users**: two unblock paths — (1) turn on any VPN then use Telegram app (simplest); (2) no VPN, fill MTProto proxy in Telegram app's Proxy Settings (more bandwidth-efficient since only Telegram is proxied, other apps go direct). In testing, MTProto proxy under 4G / Wi-Fi is more battery-efficient + lower latency than commercial VPN (OpenVPN / WireGuard), preferred choice for heavy China Telegram users.