LINE Number Warm-up Guide

This guide is for operators running customer service / marketing with LINE personal accounts on SaleWisely. The goal: over the first 1–2 weeks, warm a new account into a healthy one that looks like a real person on a clean network, sharply lowering ban rate.

Core idea: LINE scores each account with an overall trust score. The biggest difference from other channels: LINE is especially strict about adding friends — be extremely conservative on new accounts; and never create groups on a new account.

LINE doesn't ban on a single threshold; it continuously judges whether an account behaves like a real person. The most common triggers for restriction/ban:

• Adding friends too fast: a new account adding many people, mass-messaging or joining many groups in a short time → flagged as marketing/spam (LINE's #1 control point).
• Creating groups on a new account: extremely high risk; almost always triggers on new accounts.
• Abnormal login environment: frequent IP changes, shared proxies, free VPNs, emulators/cloud phones, multiple accounts on one device.
• Poor number source: virtual numbers, OTP-farm numbers, number ranges registered many times.
• Blocks/reports: heavily weighted.

Bans are severe: after permanent suspension the account is auto-deleted and hard to restore; appeals are case-by-case with no guarantee. Prevention matters far more than recovery.

Number source & registration

• Use a clean phone number that has never registered LINE (physical SIM preferred); virtual / OTP-farm numbers are far more ban-prone.
• Registration: fixed residential IP, login location consistent with registration location; one account per device, no emulators/cloud phones.
• Keep number country, IP country and profile language consistent.

First 3 days: only complete the profile, don't add or send

• Upload a photo, set a nickname and a short status message; browse around.
• Don't add friends, mass-message or create groups — make the account look like a real person is using it.

Ramp a new account gradually; LINE needs to be more conservative than other channels. This is the baseline we settled on from testing:

Two hard rules: wait at least 4 days after registration before adding friends; never create groups while the account is new.

Pacing details

• Randomize spacing of adds and messages, match daytime hours, no bursts.
• Favor natural conversation with text + stickers/emoji.

LINE friend-adding works via ID search / phone number / QR code / inside groups. Adding many strangers proactively is the #1 ban trigger, especially fatal for new accounts.

• Prefer letting customers add you: share your LINE ID / QR code / add-friend link, website widget, ad landing pages.
• When you must add: throttle hard (2–3/day for new accounts), only add people with a reason, chat naturally first before sending any link/ad.
• Being blocked/reported sharply lowers the account's standing — keep your acceptance rate healthy.

• Early on, favor natural conversation with text + stickers/emoji; few links, little mass-messaging.
• Disable broadcast for new accounts; even mature accounts need de-dupe + variants + throttling.
• No keyword stuffing/spammy CTAs, no suspicious links or attachments.

Signs warm-up succeeded

• Adding friends is no longer restricted; acceptance rate clearly improves.
• Messages/images/stickers send normally.
• Login no longer asks for verification frequently.
• Can join groups normally.

Warning signs (slow down / isolate the account)

• Login frequently asks for verification (SMS/device).
• Adding friends frequently fails / is restricted; acceptance rate plunges.
• Sending anomalies, rising blocks/reports.

What to do on restriction / ban

• On a restriction: stop and slow down immediately, check IP and behavior, don't push through.
• 'Banned / cannot log in': a permanent LINE ban auto-deletes the account — file an official LINE appeal (case-by-case, no guarantee); if it never recovers, switch numbers.

SaleWisely already has multiple built-in protections to lower ban rate: human-like send & friend-add pacing, risk monitoring with auto slow-down/pause, a stable device and network environment, and more — operators don't need to manage the internals.

What operators should do:

• Ramp by account age: keep new accounts strictly on the staged table; no adds in the first 4 days.
• No groups on new accounts: don't create groups before the account is warmed.
• Restrain friend-adding: prefer letting customers add you; throttle proactive adds hard.
• One account = one dedicated IP, login location matching registration; don't hop IP/country.

Common pitfalls

• New account adding friends / broadcasting / creating groups on day one → banned.
• Multiple accounts on one device / emulators / cloud phones → flagged instantly as abnormal.
• Frequent IP changes / shared proxies / free VPNs → risk-controlled.
• Saving money with virtual/OTP-farm numbers → very low startup success.
• Pushing through after a restriction → turns a temp restriction into a permanent ban.

Compiled from SaleWisely's long-term hands-on testing across many real accounts.