What is a business eSIM?
A business eSIM is a digital SIM that delivers a complete business phone system — call routing, auto-attendant, working-hours rules, voicemail with transcripts, call recording, hunt groups, IVR menus, and departments — on the cellular voice network, instead of as a softphone app. The line rings on your phone's native dialer like any cellular call. The call-handling features run server-side; the device runs no extra software for calls.
Business eSIMs are sold by telephony providers (Kelir is one example) as a monthly subscription. They include a US business number, the full call-handling system, and business-grade SMS (A2P 10DLC). They are unrelated to travel eSIMs (Airalo, Holafly, Saily, Nomad — short-term data plans abroad on someone else's number) and structurally different from softphone-based business phones like RingCentral, Dialpad, 8x8, Vonage Business, or Nextiva — comparable UCaaS feature surface, different delivery model.
Different from a travel eSIM.
"eSIM" is most commonly used for travel data plans (Airalo, Holafly, Saily, Nomad). A business eSIM is a separate product category despite sharing the eSIM delivery format.
| Compared | Travel eSIM | Business eSIM |
|---|---|---|
| Provides voice calls + SMS | ||
| Your own dedicated phone number | ||
| Business call-handling features | ||
| Auto-attendant + working hours + voicemail transcripts | ||
| Hunt groups, IVR menus, departments | ||
| Monthly subscription | Mostly one-time / by GB | |
| Number portability (port-in / port-out) | ||
| Intended duration | Days / weeks (travel) | Indefinite (your business) |
| Typical price | $5–30 one-time | $19.99–39.99/month |
Same system. Different delivery.
Softphone-based UCaaS — RingCentral, Dialpad, 8x8, Vonage Business, Nextiva, plus the lower-tier alternatives Quo, Grasshopper, and Google Voice — ship the same UCaaS call-handling feature surface as Kelir. The difference is delivery: they run as an app over Wi-Fi or data; a business eSIM runs the same system on a real cellular line.
| Compared | Softphone business phone | Business eSIM (Kelir) |
|---|---|---|
| Call-handling features | Yes (auto-attendant, IVR, voicemail transcripts, recording, etc.) | Yes (same set) |
| Delivery model | App / softphone | Cellular eSIM line |
| Where the call rings | Inside the app | Native dialer (lock-screen) |
| Works without internet | ||
| App must be open to ring | ||
| CarPlay / Android Auto routing | ||
| 2FA SMS reliability | Often blocked as virtual | |
| Typical US pricing | $10–25/month | $19.99–39.99/month |
Read the long-form comparison → Cellular eSIM vs softphone for business
Provisioning, in five minutes.
- 01
Choose a number
Pick a US area code and number from the carrier's pool, or submit an existing number for port-in.
- 02
eSIM is generated
The carrier provisions the eSIM profile against the chosen number. iOS sends a direct-push install prompt; Android receives a QR code.
- 03
Tap to install
On iPhone XS or newer: tap to install. On Android: scan the QR. The device adds the eSIM as a second line. Activate when ready.
Devices that support eSIM.
In the US market as of 2026, eSIM is standard on flagship and mid-range phones from the last six years. iPhone 14 and newer are eSIM-only (no physical SIM tray) — every recent iPhone supports business eSIM out of the box.
XS, XR, 11, 12, 13, 14, 15, 16, SE (2nd & 3rd gen)
3, 4, 4a, 5, 5a, 6, 6a, 7, 7a, 8, 8a, 9, 9 Pro
S20, S21, S22, S23, S24, Note 20, Z Fold/Flip
Edge+ (2022+), Razr 5G, G54, G84
OnePlus 11+, Nothing Phone (2)+, Sony Xperia 1 IV+
Series 3 and newer (cellular variants)
What it costs in the US, 2026.
Business eSIM pricing reflects the full call-handling system + cellular delivery — between the cheapest softphone services ($10–14/month, system-only) and enterprise UCaaS contact-center platforms ($30–50/seat/month). Kelir Solo is $24.99/month USD. Kelir Team Starter is $29.99/seat/month and Team Pro is $39.99/seat/month. Annual billing is two months free across all plans.
Common questions
If you're researching business eSIMs for the first time, the eight most common questions are below.
A business eSIM is a digital SIM that delivers a complete business phone system — call routing, auto-attendant, voicemail with transcripts, recording, hunt groups, IVR — on the cellular voice network, instead of as a softphone app. The line rings on your phone's native dialer; call-handling features run server-side.
No. A travel eSIM (Airalo, Holafly, Saily) provides data on someone else's number for a short trip abroad. A business eSIM (Kelir) provides your own complete business phone system — auto-attendant, voicemail transcripts, recording, hunt groups, IVR menus — on monthly billing in your home country. Same delivery format (a digital SIM profile), totally different products.
Same call-handling system feature set. Different delivery model. Softphone services like Quo (formerly OpenPhone), Grasshopper, Dialpad, and Google Voice ship the business phone system as an app you run over Wi-Fi or cellular data. A business eSIM ships the same system as a real cellular line: calls ring on the phone's native dialer, the line works without internet, and the app on the phone is a control panel for configuration — never the place calls happen.
Any phone with eSIM support and at least one free eSIM slot. In the US, that includes iPhone XS or newer (iPhone 14+ is eSIM-only), Pixel 3 or newer, Samsung Galaxy S20 or newer, and most other smartphones released after late 2018. Some older flagships support eSIM but only as a primary SIM — check device specs for dual-SIM eSIM capability.
On modern iPhones (XS+), the eSIM installs via Apple's CTCellularPlanProvisioning direct push — the carrier sends an installation prompt and the user taps to install. On Android and older iPhones, installation is via QR code scan from the carrier's app or web portal. Total time from purchase to active line is typically under 10 minutes.
Yes — because it's a real cellular phone number, services that send SMS verification codes (banks, social networks, government services) work the same way they would on any major-carrier line. This is unlike many VoIP business numbers, which are sometimes blocked by 2FA-sensitive services because they're flagged as virtual.
Yes. US business eSIM providers (Kelir included) support number portability. The FCC requires carriers to release simple ports in one business day; most ports complete in 1–3 business days. During the port window, you typically get a temporary number to use until the original number activates on the new line.
Business eSIM pricing in the US market typically ranges from $19.99 to $39.99 per month per line, depending on tier and feature set. Kelir Solo is $24.99/month USD; Kelir Team Starter is $29.99/seat/month and Team Pro is $39.99/seat/month. Higher than VoIP softphone alternatives, lower than enterprise UCaaS platforms.