WhatsApp Phone Number Warm-Up Guide

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How to Warm Up New WhatsApp Numbers (Before Using API) #

WhatsApp has recently tightened its security measures. New numbers especially eSIM numbers are now closely monitored and often get blocked if they appear suspicious.

For businesses, this can interrupt customer communication and damage trust. The solution is simple: warm up your WhatsApp numbers before connecting them to the API.

Why Warm Up a New Number? #

  • When a number is first registered, WhatsApp treats it as high risk. If it suddenly starts sending lots of messages through an API, it may be flagged as spam.
  • Warming up means using the number in a natural way—like a regular user would. This helps build trust and ensures the number is seen as genuine.

⚠️ Key Rule: Do not connect or scan the QR code immediately after registering your number. Always wait a few hours or more before using it with the API.

Step-by-Step Warming Process (3–10 Days) #

Day 0: Set Up Properly #

  • Do not connect the number to Pixalink yet.
  • Complete your WhatsApp profile (name, picture, details).
  • Add 20–50 contacts to your phonebook (empty contact lists are a red flag).
  • Send a few personal messages to real contacts and get replies.
  • (Recommended) Use a local proxy address so your phone and API share the same location. Our support team can help with this.

Day 1: Start Light #

  • Chat with 3–6 contacts manually.
  • Exchange simple text, images, stickers, or short videos.
  • Send only a few test messages via API, making sure you get replies.

Day 2: Build More Activity #

  • Increase conversations to 10–15 contacts.
  • Keep messages natural and spaced out (e.g., 1 per minute).
  • Mix in media files like images, audio, or videos.

Day 3: Grow Gradually #

  • Add more new chats each day.
  • Join or participate in WhatsApp groups.
  • Send different types of messages, including links or longer text.

Day 4: Act Like a Real User #

  • Join or create groups and communities.
  • Post status updates.
  • Slowly increase the number and variety of your messages.

Best Practices #

  • ✔️ Look human, not automated — avoid copy-paste or bursts of messages.
  • ✔️ Always add contacts before messaging (via phone or API).
  • ✔️ Spread out activity during the day.
  • ✔️ Engage two-way (don’t only send, wait for replies).
  • ✔️ Use a resident proxy for added safety.

By following this guide, your WhatsApp number will build a solid usage history and stay safe from unnecessary blocks when you begin API integration with Pixalink.

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