Number warm-up
Process of gradually using a new SIM to build reputation on WhatsApp.
Warm-up is the period a new WhatsApp number is used in real conversations before any bulk send.
Why WhatsApp bans numbers
The anti-spam algorithm monitors non-human patterns. New number + any scale send = immediate flag.
Warm-up timeline
- Days 1-7: 10-50 personal contacts, real conversations.
- Days 8-14: Up to 100 messages/day received and replied.
- Day 14-30: Can start small blasts (50/day) with random cadence.
See: safe bulk messaging.