MOBILE NUMBERS FOR BUSINESS

Mobile
SIP Numbers

Connect office and remote employees into a single network.Save on communications without compromising quality.

Smiling woman wearing a headset on a call, with abstract chat and phone icons in the background (customer support scene).

16

years on the market

27000+

clients

99.95%

uptime
Smiling woman wearing a headset on a call, with abstract chat and phone icons in the background (customer support scene).

Eliminate losses on mobile calls

These four issues reduce profits every day — Stream Telecom mobile IP telephony solves them systematically.

Remote employees lose connection with the office

Personal numbers, missed calls, and messenger chats instead of a single business line.

Expensive roaming and international calls

Communication with international clients and business trips consume budget where costs could be several times lower.

Slow phone system setup for a new location

Wired lines and hardware delay office launch for weeks — business operations are put on hold.

No analytics for mobile calls

You do not know how many inquiries were missed, which managers are performing, and which are losing customers.

Man wearing a headset, talking on the phone at a desk with a laptop displaying charts and graphs.

Why You Need Mobile SIP Numbers

A mobile number stops being an employee’s “personal phone” and becomes a company communication channel. A customer calls one familiar number, while internally the rules take over: the first available manager answers, the call is recorded, and the inquiry is logged in CRM.

You pay less for long-distance and international calls, launch a new location in a day, and get a complete view of calls — without buying hardware or extra configuration.

  • The number stays with the company, not the employee
  • Communication works anywhere there is internet access
  • Rapid scaling — from 1 to 1,000 numbers

Mobile IP Telephony: What You Get

Six benefits of a virtual mobile number that become noticeable in the very first month.

Remote employees are always connected

Your entire team is on one phone network: office staff, branches, and field employees with free internal calls.

Employee interchangeability

One number for the entire team:
if a manager is busy or on vacation, a colleague will take the call.

Fast phone system setup without hardware

The number works on an IP phone, smartphone, or laptop — no PBX hardware, wiring, or technician visit required.

Smart Virtual PBX and analytics

Call recordings, manager reports, and CRM integrations — decisions are based on data.

Convenient remote office and call center

Queues, call distribution, and operator statuses — your team can work from anywhere in the world.

Best rates in Ukraine and abroad

Calls are routed over the internet, so international and domestic destinations cost less.

Who Should Get a Mobile SIP Number

We tailor communications to your team’s needs — from a single number for a startup to a call center with hundreds of operators.

Small businesses and startups

One business number instead of personal SIM cards, minimal investment, and a plan that scales with your team.

Remote teams and branch offices

A single network across all cities and countries, with free internal calls between employees.

Call centers and sales departments

Queues, autodialing, KPI monitoring, and call recording for manager training.

Courier and logistics services

Drivers and couriers stay connected with dispatch, with call history for every delivery.

Mobile SIP Number in Ukraine: Stream Telecom Services

Choose the connection format — a cloud number or integration with your equipment.

Mobile SIP number connection

Stable communications and high quality without dependence on base station availability, even during blackouts.
Enable multichannel calling and receive multiple calls simultaneously.

GSM gateway rental

Receive calls through your SIM card installed in a GSM gateway.
You will also be able to send SMS messages from the number. Service availability depends on the mobile operator’s network.

How to Connect a Mobile SIP Number

From your request to the first incoming call — 4 simple steps.

Submit a request

Submit a short form or call us — we will get back to you within 15 minutes during business hours.

Number connection

We connect the number via SIP or install the SIM cards in a GSM gateway

Virtual PBX setup

We configure the Virtual PBX according to your technical requirements

Service activation

Receive and make calls, with everything logged in CRM.

Mobile SIP Number + Full Business Telephony

Use a multichannel mobile number together with Stream Telecom Virtual PBX — all in one convenient system.

  • Virtual PBX

  • Call Forwarding
  • Voice Menu (IVR)
  • Call Recording

  • Call Queue

  • CRM Integration
  • Call Analytics
  • Remote Employees

Connect Mobile SIP Numbers Today

Submit a request — Stream Telecom specialists will help you choose the right connection option, configure call handling, and enable additional features for your business.

ANSWERS BEFORE CONNECTION

Frequently Asked Questions about Mobile SIP Numbers

A mobile number over SIP is a standard mobile phone number whose calls are delivered through IP telephony using the SIP protocol. It can be connected to an IP PBX, Virtual PBX, SIP phone, or softphone application and used for corporate voice communications.

A regular SIM card works through a mobile operator’s base stations, while a mobile SIP number delivers calls over an IP network. This makes it easier to integrate with corporate telephony, a Virtual PBX, CRM, and other business systems, and also enables multiple simultaneous calls.

Yes. A mobile SIP number can support multiple simultaneous call channels, allowing several customers to reach the same number at the same time. This is especially useful for sales teams, support departments, online stores, and contact centers.

A mobile SIP number does not depend on the availability of the nearest mobile base station in the same way as a regular SIM card or GSM gateway. If your equipment and internet connection remain available, SIP calls can continue to work even during local power outages. For maximum reliability, backup power and a secondary internet connection are recommended.

With a GSM gateway, the SIM card connects directly to the mobile network, so call quality and availability depend on coverage and the operator’s base stations. A SIP connection provides a more stable corporate telephony setup, supports multiple simultaneous call channels, and makes it easier to integrate the mobile number with an IP PBX.

Yes. A mobile number over SIP can be connected to a Virtual PBX or your own IP PBX and configured with call-handling scenarios such as IVR, call queues, forwarding, call distribution among employees, call recording, and other telephony features.

Calls can be answered on SIP phones, computers, smartphones using SIP softphone applications, as well as on internal extensions of a corporate or Virtual PBX. Employees can work from the office or remotely, as long as they have internet access.

With a stable internet connection, SIP provides high-quality voice transmission and reliable communication. Call quality primarily depends on the internet connection, equipment, network settings, and codecs rather than the strength of the mobile signal inside the premises.

Mobile numbers over SIP are suitable for companies that need to handle a high volume of incoming calls and manage telephony centrally. Typical use cases include online stores, delivery services, sales departments, contact centers, service companies, healthcare organizations, and businesses with remote employees.

To get connected, choose a mobile number and the required number of simultaneous call channels. After activation, you will receive SIP credentials that can be configured on an IP PBX, Virtual PBX, SIP phone, or other compatible equipment. If needed, our specialists can assist with configuration and testing.