This canonical review separates Saily's current official Phone Number documentation from one narrowly scoped NexKit observation. It does not turn a US number into a promise of permanent retention, universal OTP support or guaranteed service in every location.
Evidence-backed verdict
Saily officially describes an optional US-based Phone Number add-on with voice calls and SMS, but KYC is required and MMS, premium-rate numbers and call forwarding are not supported. OTP compatibility is service-specific. NexKit has successfully used Saily Phone Number in mainland China once; that observation is not a universal availability claim.
Check calls, SMS and codesSaily describes Phone Number as an optional add-on alongside its data eSIM. The official description says it supplies a real US-based wireless number for voice calls and SMS. That is a product description, not evidence that every destination, device, account or receiving service will behave the same way.
Saily’s current help says incoming and outgoing calls share the package minutes, and billing starts when a call is answered. It also warns that callers may face their own carrier’s international rate when calling the US-based number. Saily describes voice support in more than 130 countries, but that does not establish every route or account.
| Service or capability | Official status | NexKit tested | Evidence level |
|---|---|---|---|
| Plain SMS | VERIFIED | NOT_TESTED | VERIFIED_OFFICIAL |
| Voice calls | VERIFIED | NOT_TESTED | VERIFIED_OFFICIAL |
| Listed OTP services | VERIFIED | NOT_TESTED | VERIFIED_OFFICIAL |
| Unlisted OTP / 2FA service | UNKNOWN | NOT_TESTED | UNKNOWN |
| WhatsApp account-specific behavior | UNKNOWN | NOT_TESTED | UNKNOWN |
UNKNOWN means not verified; it does not mean failed. No new financial OTP tests were run for this update.
NexKit does not store a real phone number, OTP contents, identity documents or account details.
Provider checkout option
Labelled affiliate linksThis is separate from the evidence table above. It is not a plan recommendation, price comparison, rating or availability claim, and commission does not affect editorial order.
Provider-level option only. NexKit has not verified a Saily plan, price, rating or live checkout availability in an authoritative feed; confirm every product detail with the provider before buying.
Affiliate link. NexKit may earn a commission from a qualifying purchase. Commission does not change the comparison order.
View current options at SailySaily describes it as an optional add-on that provides a real US-based wireless phone number alongside the Saily data eSIM. The official description says it supports voice calls and SMS.
NexKit has successfully used Saily Phone Number in mainland China. This is one scoped NexKit observation with incomplete historical device and network metadata, not a guarantee for every city, network, device, account or service.
Saily lists Signal, Viber, WhatsApp and Airbnb as verified for OTP. That list is provider evidence, not a universal compatibility promise; services not listed remain Unknown for NexKit.
Saily lists Wise, PayPal, Venmo, Bunq, Gemini Crypto, eToro, Cash App, Chime, Robinhood, Webull and Klarna, plus Revolut for calls only. Saily explicitly says Revolut SMS-based 2FA is not verified.
WhatsApp appears in Saily's official list of apps verified for OTP. NexKit has not stored an OTP or account detail and does not extend that statement to every WhatsApp account or future policy change.
Unknown. The retained official sources describe a monthly subscription but do not establish how long a number is retained after cancellation or expiry, or whether it can later be recycled.
No, according to Saily's current help-centre description: MMS, premium-rate numbers and call forwarding are not supported. Plain-text SMS is the safer documented use case.
Yes. Saily says identity verification is required before Phone Number functionality is activated. NexKit does not store identity documents, OTP contents or account details.
No static price is published in this review. Check the current Saily product flow for the applicable price, currency and terms at the time of purchase.
Official sources checked 29 August 2026: Phone Number overview, SMS and MMS, OTP and 2FA, KYC requirements, Minutes and billing, Saily overview.
Every figure on this page was read from the provider’s own terms, help centre or product page on the date shown, and links back to that page. Each fact also states its reach, so a policy read from one product family is never presented as covering everything a provider sells. Where a provider states a policy but publishes no number in the pages we checked, this page says so and lists what we checked. Source links are citations, not paid links. A separately labelled provider CTA may be an affiliate link; commission never changes the evidence, comparison order or recommendation method.
Read the full review methodologyWhere to go from here
Read the evidence, then check the current Phone Number option directly with Saily.