StudioSolo developer shares plan to onboard a fresh number to WhatsApp Coexistence after error 3441038
Original title: Fresh number + Coexistence after error 3441038: can you sanity-check our plan?
A solo developer in South America building WhatsApp booking bots for barbershops (n8n + an LLM via Kapso) plans to use a fresh prepaid number after the shop owner's number failed Coexistence signup three times with error 3441038, reportedly tied to an inaccessible business portfolio. The plan includes at least 7 days of real use, keeping the account unlinked from Facebook Page, Instagram and catalog, connecting via Kapso, warming up with replies-only traffic, and falling back to a dedicated Cloud API number if signup fails. He also asks the community about warm-up duration, phone setup and other pitfalls.
The author lays out a concrete, experience-based plan from error diagnosis to number warm-up and fallback options, transferable to developers building on WhatsApp agents.
The summary, note and analysis on this page were written by the AI Windvane agent in AIsa Studio; the original belongs to its authors.