What’s the difference between an eSIM and a physical SIM here?

Both connect the same business line to a phone. An eSIM is provisioned digitally — no card to ship or insert — while a physical SIM is a standard card you drop into any unlocked smartphone. You can use whichever fits each device; the calling and texting experience is the same.

Do employees need to install an app?

No. The service works with the phone’s native dialer and messaging, so there’s nothing to install or train on. Staff can still use the intSignal softphone app on top if they want desktop and multi-device features.

Can we keep our existing numbers?

Yes. Existing numbers can be ported and then managed alongside the rest of your intSignal service. Number inventory and porting are handled during onboarding.

Does it work internationally?

Yes — the service includes international roaming so the business line stays reachable while traveling. Where a country isn’t in the coverage area, users can continue over Wi-Fi calling or a local data SIM.

UCaaS · Business cellular

Your business line, on any smartphone

Put your company number on a mobile with an eSIM or physical SIM — no separate app required. Calls, texts, and voicemail stay unified with your intSignal UCaaS platform, so a call to your desk rings your mobile, and the number you text from is your business number, not a personal one.

Talk to our team ⟶← All UCaaS features

Live, interactive demo — click to explore it.

eSIM & physical SIMWorks with any unlocked phoneNationwide coverageInternational roamingOne business numberUnified voicemail & texting

Business cellular · line management

AMAlex Morgan
(949) 555-0100 · business line · Ext 1001Line active

SignalStrong · 5G

LocationCalifornia

eSIMActivated

RoamingOn · 32 ctry

Data (mo)12.4 GB · Unltd

Talk640 min · Unltd

Texts1,284 · Unltd

Hotspot15 GB

Assigned features

Unlimited talkUnlimited textUnlimited dataIntl roamingMobile hotspot

Visual voicemail + transcriptionOn

Shared contacts — company directory142 contacts

One number, everywhere

Desk, softphone, and mobile — one identity

Your business number follows you. A call to your extension can ring your desk phone, the softphone, and your mobile at once, and calls you place from the mobile show your business caller ID — not your personal number. Staff keep their personal number private while staying reachable on the company line.

✓Single business identityOne number across desk, app, and cellular.

✓Business caller IDOutbound mobile calls present the company number.

✓Keep personal privateNo need to hand out or use a personal number for work.

✓Unified voicemailOne visual voicemail inbox with transcription across devices.

One number, every device

Desk phoneSoftphoneMobile

Your business number

unifyOne line rings everywhere; outbound shows your business ID.

eSIM & SIM

Provision in minutes, no special app

Activate an eSIM digitally or drop a physical SIM into any unlocked smartphone — the service works natively, so there’s no separate calling app to install or train people on. It’s straightforward to roll out across a team and to reassign as people change roles or devices.

✓eSIM activationDigital provisioning — no waiting on a shipped card.

✓Physical SIM optionStandard SIM for any unlocked smartphone.

✓No app requiredNative dialer and messaging — nothing to install.

✓Easy to reassignMove a line to a new device or employee quickly.

eSIM & SIM activation

1Scan eSIM QR or tap activate

2Business line provisioned

3Call & text instantly

activateeSIM in minutes, or a physical SIM for any unlocked phone — no app.

Coverage

Coverage at home and abroad

The service runs on major-carrier networks for nationwide coverage, with international roaming so travelers stay reachable. Where a country isn’t covered, users can keep making and taking calls over Wi-Fi or a local data SIM — so the business line works essentially anywhere.

✓Nationwide networkRuns on major-provider towers across the U.S.

✓International roamingStay reachable on the business line while traveling.

✓Wi-Fi calling fallbackKeep calling over Wi-Fi where cellular isn’t available.

✓One billMobile lives alongside the rest of your intSignal service.

Coverage & roaming

Nationwide coverage99%

International roaming92%

Wi-Fi calling fallback100%

reachRuns on major-carrier networks with global roaming.

Managed by intSignal

Provisioned and supported with your platform

Because cellular is part of intSignal UCaaS, provisioning, number management, and support come from the same team that runs your phones. Add lines, port numbers, and manage users from the same control panel — or have intSignal handle moves, adds, and changes for you.

✓One control panelManage mobile lines alongside users and devices.

✓Number portingBring existing numbers under intSignal management.

✓10DLC-ready textingBusiness SMS from the mobile line, carrier-registered.

✓Optional managed opsLet intSignal handle provisioning and day-two changes.

Provisioning & management

Add a lineeSIM · 2 min

Port a numberManaged by intSignal

Assign to userOne control panel

10DLC textingCarrier-registered

manageProvision, port, and manage mobile alongside your phones.

Add mobile to your phone system

Tell us how many lines and where your team travels — we’ll scope eSIM/SIM and coverage to match.

Book a walkthrough ⟶