What Signal expects from a number
Before you buy anything, this is what has to be true of the line for Signal to accept it.
Must be able to receive an SMS or an automated voice call within Signal's verification window.
Should have no prior Signal registration history, since a previously registered number may carry a Registration Lock PIN you don't have.
Needs to stay reachable if you plan to reinstall Signal or switch phones later, since Signal re-verifies the number then too.
Why numbers get rejected on Signal
Most failures are one of these, and knowing which one you have hit decides whether retrying helps or wastes another attempt.
Signal ties the phone number directly to your cryptographic identity; if the number previously registered a Signal account, re-registering may require the Registration Lock PIN set by whoever used it before you.
Signal's anti-abuse system throttles or delays SMS and voice registration on numbers that have registered too many times too quickly across its network.
Signal falls back to an automated voice call if the SMS code doesn't land within a short window; a number that can't receive voice calls stalls at that step.
Because the number is the identity, Signal re-verifies it whenever you reinstall the app or switch devices — a number you no longer control after cancellation breaks that, not just the signup.
Where to buy a number for Signal
Availability and price both move with supply in each market. These pools tend to suit this service.
Frequently asked questions
Can I use a rented number to register Signal?
Yes, if it's a real cellular number that hasn't already registered a Signal account. Signal verifies by SMS or an automated voice call. The harder part isn't getting the code — it's what happens if the number carries history: a prior Signal registration on that exact number, protected by a Registration Lock PIN, will block you until that PIN is provided.
What is Signal's Registration Lock and why does it matter for a rented number?
Registration Lock is an optional PIN a Signal user can set so their number can't be re-registered by anyone else, even with the right SMS code. If a previous holder of a rented number enabled it, you'll hit a wall Signal itself put there on purpose. There's no way to check this in advance — it only surfaces when you try to register.
Why does Signal keep asking me to re-verify?
Because the phone number is your account identity, not just a delivery address for one code. Reinstalling the app, switching devices, or re-linking Signal after a gap can all trigger a fresh SMS or voice verification on the same number. If you've cancelled or released the number by then, you'll need a new one to get back in.
Is Signal a good candidate for a one-time rented number?
It's a harder one than most services on this list. Signal works best with a number you intend to keep reachable, since the number is bound to your account for as long as you use it — not just for the initial signup. If you only need Signal briefly, be aware you may need to re-verify before you're done.
Does Signal accept VoIP numbers?
Signal has a documented history of extra friction toward VoIP and clearly disposable numbers, on top of the general anti-abuse throttling it applies to any number registering repeatedly across its network. A real cellular number avoids the VoIP-specific flag; it doesn't avoid the rate-limiting Signal applies independent of number type.
Get a Signal verification number
Pick a country, get a real cellular number, and receive the code. If it never arrives, the balance returns to your account.