Question 1

Where is LINE available? Where is it blocked?

Accepted Answer

LINE is downloadable in ~230 countries, but **deep usage** is concentrated in 4 countries (🇯🇵 Japan / 🇹🇼 Taiwan / 🇹🇭 Thailand / 🇮🇩 Indonesia); **registration** is hard-locked to 5 phone-number countries (🇭🇰 / 🇯🇵 / 🇰🇷 / 🇹🇼 / 🇹🇭). Hard-blocked only in 🇨🇳 China mainland (GFW 2014) + 🇰🇵 DPRK — one of AF3\'s least-blocked IMs. ❌ Hard-blocked in 2 countries: 🇨🇳 China mainland (GFW July 2014, fully blocked chat servers; earlier 2013-12 LINE admitted keyword filtering for Chinese numbers) · 🇰🇵 DPRK (gov

Question 2

⭐ Why can't I log into LINE with China-mainland SIM even with VPN?

Accepted Answer

This is LINE\'s UNIQUE double-block in AF3\'s matrix — China-mainland SIM + VPN still can\'t log in. LINE checks not just your IP but also your SIM card\'s carrier country. 💡 AF3 only checks IP reachability — cannot predict the SIM-check layer. If AF3 is green but you still can\'t log in with a CN SIM, this is why.

Question 3

📱 How do I register LINE? What if I don't have an HK/JP/KR/TW/TH number?

Accepted Answer

LINE new-account registration is hard-locked to 5 phone-number countries (HK/JP/KR/TW/TH); other countries\' numbers **cannot register at all**. LINE\'s #1 user barrier — stark contrast with WhatsApp / Telegram (any country number). 💡 Difficulty: LINE (5-country lock + SIM check) > Instagram (email/phone + real-name + 50+ fingerprints) > Facebook (email/phone + real-name) > WhatsApp (any country number) > Telegram (any number + optional email). LINE is the hardest IM to register for.

Question 4

🔐 Is LINE secure? What does Letter Sealing E2EE cover?

Accepted Answer

LINE has proprietary E2EE **Letter Sealing** (launched 2015, default 2016), but **1:1 only** — group chats and multi-party calls are NOT E2EE by default. LINE\'s security sits between WhatsApp (best, default group-chat E2EE) and KakaoTalk (worst, Secret Chat opt-in).

Question 5

📉 Why does LINE keep shutting down features in Hong Kong / Korea / Indonesia?

Accepted Answer

Since 2021 LINE has pivoted from \'global expansion\' to \'Japan / Taiwan / Thailand core-market deepening\'. Unprofitable regional features are being shut down, affecting many non-core-market long-time users.

Question 6

Why do check results differ from actual use?

Accepted Answer

AF3\'s result only represents IP accessibility at that moment — a one-time snapshot. We cannot monitor your network after the check. Accessible ≠ can log in ≠ features usable. If AF3 shows green but LINE isn\'t actually working, common causes: These are account / SIM / device layer issues, unrelated to AF3\'s network reachability check. Contact your VPN provider or switch node / device / SIM.

Question 7

🇯🇵 LINE vs WhatsApp / WeChat / KakaoTalk / Telegram — how do they compare?

Accepted Answer

LINE (194M MAU) is a national app in Japan / Taiwan / Thailand, but faces different competitors elsewhere. Different dimensions favor different platforms. 🏆 Who needs which: (a) Japan / Taiwan / Thailand friends → LINE (core-market national app); (b) India / Brazil / global → WhatsApp; (c) China-mainland users → WeChat (domestic) or Telegram (VPN); (d) Korean friends → KakaoTalk; (e) North America / Latin America → Messenger; (f) channels / mega-groups → Telegram; (g) highest privacy → Signal. 💡

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