A mobile number that works 100% online
Get a real mobile number that works 100% online. No SIM card, no mobile carrier - just pure VoIP. Make and receive calls and send text messages via VoIP from anywhere in the world.
What is a virtual mobile number?
A virtual mobile number is a phone number with a Polish area code (+48 457 / 720) that operates exclusively via the VoIP (Voice over IP) protocol, without a physical SIM card and without a contract with a mobile carrier.
A VoIP mobile number is assigned to your telephone infrastructure (PBX, softphone, app), not to a specific device. This means that:
Who is it for? For companies that want to be identified by a mobile number while having complete freedom in managing the communication carried out through it.
A single number can receive calls on multiple devices simultaneously
You can operate from anywhere with internet access
You send and receive SMS messages via VoIP without a separate GSM gateway
You can transfer the number between systems without downtime
How does a VoIP mobile number work?
An online mobile number uses SIP (VoIP) infrastructure to emulate the functionality of a traditional SIM card on an IP network.
A customer calls your mobile number (+48 457 XXX XXX)
The call is routed to the ACTIO network (VoIP / SIP Trunk)
Forwarded to your PBX / softphone / app
You answer the call or receive the text message - wherever you are
What can you do with a virtual cell phone number?
Voice calls
- Receive and make calls from a mobile number via VoIP
- Display the mobile number as CLI - customers see a Polish 457/720 mobile number
- One number to multiple devices (IP phone, smartphone, laptop, PBX)
- Full call history and recordings in the dashboard
SMS via VoIP
- Receive SMS messages on a virtual mobile number in the dashboard or via API
- Send SMS messages via VoIP to customers while retaining the sender's number
- SMS API integration with your CRM, online store, or help desk
- Support for two-way SMS conversations
- Automatic SMS confirmations (e.g., after a request is received)
Management and integrations
- Conditional call forwarding (business hours, queues, groups)
- Integration with VoIP PBX (Asterisk, FreePBX, 3CX, Microsoft Teams)
- Access via REST API for full automation
- Porting an existing mobile number (MNP)
When should you choose a virtual cell phone number?
E-commerce and customer service
Customers trust mobile numbers more than landlines; studies show a higher answer rate for incoming calls. ACTIO's virtual mobile number via VoIP gives you this benefit without the costs of a mobile carrier and with additional features.
Companies with remote employees
The entire team works under a single mobile number, regardless of location. Calls are queued and distributed just like in a call center.
Marketing campaigns and source tracking
Assign a separate online mobile number to each campaign (Google Ads, social media, billboards). Measure ad effectiveness based on incoming calls with call tracking fully integrated with Google Analytics.
SMS notifications for customers
With SMS over VoIP, you can send automatic notifications (order confirmations, appointment reminders, alerts) directly from your CRM system without external SMS gateways.
International expansion
A mobile number via VoIP allows you to have local numbers in multiple countries under a single account. A Polish company can have a mobile number in Germany, the Czech Republic, Slovakia, or the UK without setting up companies abroad.
Virtual mobile number vs. traditional SIM card
| Feature | VoIP cellular number (ACTIO) | Traditional GSM operator |
|---|---|---|
| SIM card | Not needed | Required |
| Physical device | Not required | Required |
| SMS API / automation | Built-in | No or expensive add-on |
| Multiple devices on 1 number | Yes | No |
| Connections abroad | Local cost (IP) | Roaming |
| Scalability (10, 100 numbers) | Instant | A long process |
| Integration with VoIP PBX | Native (SIP) | Complicated |
| SIP mobile number | Standard | Not available |
| Pricing | Number from PLN 25 net/month; calls PLN 0.08/min (mobile), PLN 0.05/min (landline) – full price list | Monthly plan |
SIP Trunk on a mobile number
An ACTIO virtual mobile number supports trunking. It is the same service as SIP Trunk, only on 457 / 720 mobile numbering. Connect your PBX (Asterisk, FreePBX, 3CX, Microsoft Teams) and run as many simultaneous calls as you have channels.
| Channels | No commitment | With a 12-month discount | With a 24-month discount |
|---|---|---|---|
| 1 call | included in the price of the number | ||
| up to 20 channels | PLN 120.00 | PLN 110.00 | PLN 100.00 |
| up to 50 channels | PLN 249.00 | PLN 229.00 | PLN 200.00 |
| over 50 channels | individual pricing | ||
Net prices per month. The mobile number itself costs from PLN 25.00 net/month (50 / 39 / 25: no term / 12 / 24 months) and includes one call, so you only add channels once you need to talk in parallel.
The contract is optional
You can use the service with no end date. A 12- or 24-month commitment is simply a lower rate for the same channels.
There is no intermediate tier
A company that needs 5 or 10 simultaneous calls enters the "up to 20 channels" tier: PLN 120.00 net/month with no commitment.
Need trunking on a landline number? See the rates on the SIP Trunk page.
Technical specifications - SIP mobile number
Protocol
SIP 2.0 (RFC 3261) + RTP/SRTP
Audio codecs
G.711 (alaw/ulaw), G.729, Opus
Transport
UDP / TCP / TLS
SMS
SIP MESSAGE (RFC 3428) or SMPP v3.4
API
REST API with webhooks (JSON), online documentation
Availability
99.9% SLA, redundant infrastructure
Compatibility
Asterisk, FreePBX, 3CX, Cisco UCM, Yeastar, Microsoft Teams Direct Routing
Numbers
+48 457 / 720 pool (Polish mobile numbers)
Number portability
MNP - port your mobile number to ACTIO
Frequently Asked Questions (FAQ)
Does a virtual mobile number look like a regular GSM number?
Yes. Numbers from the ACTIO pool are indistinguishable from traditional mobile numbers. Customers see a normal mobile number and don't know it works via VoIP.
Can I send SMS messages via VoIP to regular phones?
Yes. SMS messages sent from a virtual mobile number via VoIP reach all GSM networks in Poland and abroad exactly the same way as SMS messages from a traditional SIM card.
Does a VoIP mobile number work when I don't have internet access?
VoIP calls and SMS messages require an internet connection. However, you can set up automatic call forwarding to a backup number (mobile or landline) in case of an internet outage.
How many VoIP mobile numbers can I have?
As many as you need. ACTIO supports from one to hundreds of numbers. Perfect for call centers, e-commerce, and companies with multiple departments.
Can I port my current mobile number to ACTIO (MNP)?
Yes. We support mobile number portability (MNP) - you keep your existing number and gain VoIP infrastructure.
What is a SIP mobile number?
A SIP mobile number is a virtual mobile number registered on the SIP (Session Initiation Protocol) network. It works exactly like a GSM number but is supported by VoIP infrastructure - without a SIM card, over the internet.
How do I integrate the SMS API with my system?
ACTIO provides a REST API with comprehensive documentation. Integrating the SMS API with a CRM, online store, or app typically takes a few hours of developer time. We offer ready-made plugins for popular systems.
Ready to streamline your company's communication?
Fill out the form - one of our advisors will contact you within 24 hours to provide a free quote tailored to your business.