Why Free Public Verification Numbers Don't Receive Codes: Most of the Time the Code Was Never Sent

When a free public number doesn't receive a code, it's usually not a broken page but the platform rejecting the send based on line type or the number being overused and blacklisted. The article gives a four-layer diagnostic: when to stop and switch numbers, when you're just being drowned out by others' codes, what scenarios public numbers still work for, and how to choose between short-term and long-term numbers when switching.