When using new or roaming SIMs, SMS can take tens of seconds to arrive. That’s normal but annoying. Here’s how to speed it up.
Common causes
International routing and anti-spam checks.
Temporary congestion on the visited network.
Device radio state (poor signal, LTE-only without fallback).
Quick fixes
Toggle airplane mode for 10 seconds, then try again.
Switch preferred network type (e.g., 4G ? 3G) and resend.
Send a second SMS with a slightly changed code to re-trigger routing.
Using CheckMyNumber.uk
We wait ~30 seconds by design to absorb network delays. If nothing appears, retry once or verify on Wi-Fi to rule out data issues when loading the result page.