• Device won't register / no dial tone → Registration Troubleshooting
• Incoming calls not arriving / going to voicemail → DID Troubleshooting
• Outbound calls failing → Outgoing Calls Troubleshooting
• Audio problems (silence, echo, one-way) → Call Quality Issues
• Account under review → Account Verification & Compliance

Create a free account at voip.ms/signup. Once active, add funds, order a phone number, and configure your device. See the Getting Started Guide for a full walkthrough.

Opening an account is free. The minimum deposit is $15 USD, which becomes your account balance.

No contracts. Open an account, use the service, and cancel at any time with no penalties.

VoIP.ms is a BYOD (Bring Your Own Device) service — we do not sell hardware. Any SIP- or IAX2-compatible device works. See Devices for configuration guides.

Yes. The official VoIP.ms Softphone is free for iOS and Android, with push notifications and SMS support. Third-party apps like Zoiper, Linphone, and Bria also work. See Softphones.

Yes — community.voip.ms is a peer-driven space for configurations, tips, and troubleshooting.

Accounts are free to open. Once registered, dial 4443 (echo test) for free — no balance required — to verify registration and audio quality.

VoIP.ms is a Canadian company founded in 2007, headquartered in Montreal, QC, with a technical office in Merida, Yucatan, Mexico.

Visa, Mastercard, American Express, PayPal, Google Pay, Apple Pay, and Bank Wire. Contact [email protected] for Bank Wire details.

$15 USD.

Unused balance from deposits made within the last 90 days can be refunded upon request. Older balances remain available for use but are not refunded. Contact [email protected].

Yes, Canadian customers pay Sales Taxes — see Taxes in Canada.

Monthly DID fees are billed regardless of usage. Some features (eg. virtual fax) also carry monthly fees. Check Finances → Transaction History in the portal.

Outbound calling stops when balance is insufficient. Inbound calls continue as long as the DID monthly fee is covered. Set up Auto-Replenish under Finances → Automatic Billing to avoid interruptions.

Outbound calls are billed per minute. Most destinations use a 6-second billing increment. Some countries including Mexico, China, and several Pacific nations (see VoIP.ms Terms of Service) use 60-second increments. Inbound calls are billed per the DID rate plan plus a monthly number fee. See Service Cost.

None. Cancel your account or individual numbers at any time.

Yes. Find your referral link in the portal under Finances → Referral Program, or more information here: voip.ms/en/features/referral-program.

VoIP.ms performs compliance reviews on new accounts to meet telecommunications regulatory requirements and prevent fraud. This is standard practice across VoIP providers. If flagged, you will receive an email with instructions. See Account Verification & Compliance.

Depending on account type: business registration documents, government-issued ID, a tax identification number (TIN), or a description of intended service use. See Account Verification & Compliance.

Once documents are submitted our team reviews them as quickly as possible. Ensure documents are legible and match your account information to avoid delays.

Suspensions may occur during a compliance review, if unusual traffic is detected, or if a security risk is identified. Contact [email protected] for the reason and resolution steps.

By default it matches your portal login password. Change it under Main Menu → Account Settings → Security. Subaccount passwords are set separately per subaccount.

A DID (Direct Inward Dialing) number is a virtual phone number anyone can dial to reach you — not tied to a physical line. See Order a DID Number.

• Local US and Canadian numbers — by area code and city
• Toll-free numbers — 800, 888, 877, 866, 855, 844, 833
• International numbers — available in 100+ countries
• Virtual numbers — numbers that forward to another destination

No. DIDs are for receiving calls only. Your outbound caller ID is configured separately in account or subaccount settings.

Yes. Use a Ring Group to ring several devices simultaneously or in sequence, or a Call Queue to distribute calls to agents.

Yes. See Porting a Number or contact [email protected].

Yes. Start the request with your new provider — VoIP.ms approves all valid port-out requests. Once complete, cancel the DID under DID Numbers → DID Billing. Questions: [email protected].

Go to DID Numbers → DID Billing and cancel the number. This cannot be reversed.

Any device supporting SIP or IAX2 protocol — ATAs, IP phones, softphone apps, and PBX systems. See Devices for a hub of configuration guides.

Yes, as long as it is unlocked, supports SIP or IAX2, and you have access to its configuration settings.

Yes. VoIP.ms works as a SIP trunk provider with any SIP-compatible PBX. See PBXs. If you don't run your own, VoIP.ms PBX covers the hosted PBX built into the portal.

Yes. Configuration guides are available for Asterisk, FreePBX, 3CX, Issabel, and many more. See PBXs.

Strongly discouraged — it causes registration conflicts. Create a subaccount for each device so each has unique credentials.

Identify your symptom first:

• Device not registering → Registration Troubleshooting
• Outbound calls fail → Outgoing Calls Troubleshooting
• Inbound calls not arriving → DID Troubleshooting
• Audio issues → Call Quality Issues

Check your CDR — if a call doesn't appear there, the issue is on your device or network side.

Common causes: insufficient balance, invalid caller ID (must be 10 digits for North America), or a firewall blocking SIP. Check your CDR for the specific error code.

One-way or no audio is almost always a NAT/firewall issue — RTP ports (UDP 10000–20000) may be blocked, or SIP ALG is enabled on your router. See Call Quality Issues.

International calling is disabled by default. Enable it under Main Menu → Account Settings → Account Restrictions. Some destinations require an additional unlock step in the portal.

Caller ID is the number displayed when you call. For North American calls it must be exactly 10 digits with a valid area code — calls with an invalid caller ID are rejected. See Caller ID.

CNAM (Caller ID Name) is the name shown alongside your number on outbound calls. For US calls this is controlled by a national database. Canadian calls support name pass-through from your device. See Caller ID.

Yes. SMS and MMS are available on most US and Canadian local DIDs and on toll-free numbers after verification. SMS must be enabled on each DID individually. See SMS & Text Messaging.

No. SMS is available on most US and Canadian local numbers but not all. Toll-free numbers require separate verification. International DIDs do not support SMS as of today.

First check the portal SMS inbox. If messages appear there but not in your app or email, the issue is with your notification delivery method.

US and Canadian carriers silently filter unregistered business traffic, messages from unverified toll-free numbers, URL shorteners, and spam-like content. Neither sender nor recipient is notified when a message is dropped.

Yes. US business SMS on 10-digit numbers requires 10DLC campaign registration. Toll-free SMS requires separate verification. Contact [email protected].

Use the server geographically closest to you. See Choosing a Server for the full list of hostnames and IPs.

No — they must match. A mismatch between your registration server and your DID's Point of Presence (POP) means inbound calls won't reach your device. See Choosing a Server.

Yes. See Choosing a Server for more information.

Yes. If port 5060 is blocked by your ISP, use UDP/TCP 5080 or 42872. For SIP-TLS, ports 5061 and 42873 are available on numbered servers. IAX2 uses UDP 4569.

Yes. SIP-TLS and SRTP encryption are available and can be enabled per subaccount. Recommended on public or shared networks.

Yes. TCP is fully supported on all servers.

Not currently. SIP and IAX2 are available over IPv4 only.

G.722 (HD wideband — recommended), G.711u (uLaw/PCMU), G.729a, and GSM.

International calling is disabled by default. Under Account Settings → Account Restrictions you can set maximum call duration and spending caps.

Repeated failed authentication attempts trigger automatic IP blocks. Contact [email protected] with your IP if incorrectly blocked. Prevent this with strong passwords and IP Authentication on subaccounts.

Use strong unique passwords, enable IP Authentication where possible, set international call restrictions, and keep your PBX up to date. See PBX Security Tips.

Yes, with prior written authorization. Contact [email protected] before sending this type of traffic. Unauthorized use results in immediate suspension.

Yes, for 40+ countries. Register a physical address per DID under DID Numbers → Emergency Services. See E911.

Yes. Virtual Fax numbers can be ordered and managed through the portal. See Virtual Fax.

Yes. See Audio Conferencing.

Yes — hosted voicemail with voicemail-to-email delivery is available on all subaccounts. See Voicemail.

Yes. See Microsoft Teams.

Yes. The VoIP.ms REST/JSON and SOAP API supports over 100 methods covering DID management, subaccounts, CDR, SMS, fax, routing, and more. See API Overview.

Yes. The portal includes a Reseller section with client management, custom rate packages, and a white-label interface. See Reseller Basic Guide. Please make sure to review VoIP.ms Terms of Service.

For volume-based pricing, contact [email protected] with your traffic destinations and average monthly minutes.