Why Didn't My Verification Code Arrive?

You bought a number, requested a code, and nothing showed up. It's a common enough problem that it's worth understanding the actual causes rather than just retrying and hoping — most of them have a specific fix, and one of them isn't fixable at all (which is exactly the case a refund exists for).

The service hasn't actually sent it yet

The most common explanation is also the least interesting: the sending service is simply slow. Some verification systems queue messages during busy periods, or retry a few times before giving up. If you requested the code seconds ago, give it a minute before assuming anything is wrong.

The route to that specific number is degraded

SMS between the sending service and your number travels through one or more aggregators and carriers, and any hop along that path can be congested, rate-limited, or (rarely) temporarily blocking messages from that sender. This is a route problem, not a problem with your account — trying a different country or a different number for the same service usually resolves it immediately.

The service is filtering the number itself

Some platforms actively try to detect numbers that come from virtual/temporary pools and decline to send to them at all — silently, with no error message on your end. This isn't a bug or a routing failure; it's the service choosing not to deliver. If a particular service consistently fails for a given country, that's usually why, and a refund (since no code arrived) is the correct outcome rather than a retry loop.

You've hit a per-number sending limit

Occasionally a service will have already sent several codes to a number in a short window (from other, unrelated attempts on a shared pool) and temporarily throttles further sends to it. Switching to a different number sidesteps this immediately.

What to actually do

1. Wait a minute — most delays resolve on their own.
2. If nothing arrives, cancel the number. If no code was received, the purchase is refunded to your wallet automatically — this is Simvo's no code, no charge policy, not something you need to request.
3. Try again, ideally with a different country for the same service.
4. If a specific service reliably fails for you, that's useful to know for next time — some services are simply stricter about virtual numbers than others.

How Simvo tries to reduce this before it happens

Rather than handing you the cheapest available route regardless of its track record, Smart Pick weighs recent delivery performance alongside speed and price when recommending a number — see the FAQ for how that works. It can't eliminate route failures (nothing can, since the sending service ultimately decides whether to deliver), but it does mean the default recommendation isn't chosen blind to whether it actually tends to work.