General

"Unauthorised" on outbound calls using a verified caller ID

Why some outbound calls using Verified Caller IDs fail.

Creating a Register Based SIP Trunk

How to generate a new SIP Trunk QR Code

Understanding Phone Number Ranges in Australia

Geographic phone numbers in Australia are allocated by the ACMA in ranges tied to Standard Zone Units (SZUs), not suburb by suburb. One SZU can cover many suburbs, so your suburb may not be listed directly and a nearby town or zone name appears instead. ACMA also allocates different ranges to different providers: Telstra holds many traditional ranges, and Crazytel is not partnered with Telstra, Optus, or other carriers, so the prefixes Crazytel offers in your area come from the ranges allocated to us and can differ from the pattern on Telstra or Optus numbers nearby. A different prefix is still a valid local number, calls work the same, and numbers can be ported between Australian providers.

Pre-Paid Billing Policy

Crazytel is a pre-paid service. Accounts must remain in credit at all times or all services are automatically suspended, and services cannot be unsuspended until the balance is back in credit. This is a system restriction that staff cannot override. Auto top-up is required on every plan except Pay-As-You-Go (P.A.Y.G). SIP trunk fees bill on the 1st of each month, and numbers bill on your DID billing date. Invoices starting with U are usage invoices for the month just gone, and invoices without a U are your phone number (DID) charges issued separately, so you typically receive 2 invoices each month. Invoices show as paid because every charge comes out of your account balance in real time: they are usage and tax records, not payment requests. If usage or charges exceed your top-ups, the balance can go negative and all services stop until you top up again. We do not send debt to a debt collector. Unpaid balances are written off when the account is closed, after a notice timetable: Day 0 email and SMS, Day 2 SMS, Day 7 email, Day 8 formal closure notice, and a final warning about 3 days before closure. Payment arrangements and hardship pauses are available, and the TIO can be contacted on 1800 062 058.

Calling 000 (Triple Zero) on Crazytel

Calls to 000 (Triple Zero) are free with priority access on every Crazytel service. On the new SIP Trunk network, 000 calls bypass every account check, including a disabled trunk, a negative balance, or a spend limit. A VoIP phone needs power and internet, so if your power or internet is down it cannot call 000. Always use a mobile phone to call 000 if you can.

Crazy 5G mobile plans - SIM-only 5G on the Optus network, pricing and international roaming

Crazy 5G SIM-only mobile plans on the Optus network: 20GB $25, 50GB $35 or 100GB $45 per month, 5G speeds up to 150Mbps, calls and SMS included, $10 per day Zone 1 roaming, no lock-in contract.

CrazySPAM Call Guard - free to use, block spam, scam and telemarketer calls

CrazySPAM Call Guard is free to use and does not cost anything. No monthly fee and no per-call charge. Turn on Call Guard to block spam, scam, telemarketer and international callers.

Can I use my existing modem or router with Crazytel?

Can I use my existing modem or router with Crazytel on my home internet service? Yes, only if it is not a locked modem or locked router. A provider locked modem, carrier locked router, Telstra locked modem, Optus locked router, modem locked to current provider, or router locked to ISP will not work. Use Crazytel with an unlocked modem or router, SIP phone, ATA, or softphone when you switch from another provider.

Common Virtual Mobile Number questions: VMN additional product, SIP Trunk, CrazyPBX, CIS, SMS, and CrazyPhone

Common Virtual Mobile Number (VMN) questions. A Virtual Mobile Number is an additional product and add-on. You still need a SIP Trunk or CrazyPBX to make calls and receive calls. There is no Critical Information Summary (CIS) and no CIS for Virtual Mobile Numbers. Sending SMS is 5 cents (5c) per SMS. CrazyPhone unlimited SMS add-on is $4.95 a month for unlimited SMS to Australian numbers with the CrazyPhone app.

Virtual Mobile Numbers for WhatsApp, WhatsApp Business, Telegram, Google, Banks, and 2FA

Do Crazytel Virtual Mobile Numbers work with WhatsApp, WhatsApp Business, Google, banks, two factor authentication, 2FA, OTP SMS, and verification codes? The number supports SMS and voice. Acceptance is up to the third party. Crazytel cannot guarantee it. For picky services, buy a prepaid SIM from Telstra, Optus, or Vodafone, set it up, then port that number to Crazytel. Mobile numbers can be ported back out anytime to any Australian provider. Crazytel has no contracts.

Crazyphone and other Softphone applications

The Crazyphone application, and recommended 3rd party softphone applications.

Why Can't I Make Calls With Telstra Caller ID?

Porting a number to Crazytel

Porting a number to Crazytel: keep your existing mobile, landline, 1300 or 1800 number. Free port-in, timeframes by number type, and the step-by-step Porting Manager application.

What Numbers Can Crazytel support?

Making Calls While Overseas with Crazytel Services

When traveling internationally, staying connected to Australia is essential for both personal and business needs. Crazytel offers solutions that allow you to make calls to Australia seamlessly, regardless of your global location.

Receiving Calls with a Mobile Softphone while traveling internationally.

The Crazytel CrazyPhone mobile softphone app transforms your smartphone into a powerful business phone system. This guide specifically focuses on how to properly configure and optimize your mobile softphone to receive incoming calls reliably, both within Australia and while traveling internationally.

Error Downloading External Provisioning -- What, and why?

If you're encountering an ""Error Downloading External Provisioning"" message when trying to log in to the Crazyphone app, this guide will help you resolve the issue. This error typically occurs when users attempt to manually enter credentials instead of using the required QR code authentication method.

Receiving SMS with a Mobile Softphone While Overseas

Many travelers need to stay connected to their Australian phone number while overseas, particularly for receiving SMS messages like verification codes, important notifications, and business communications. This guide explains how you can receive SMS messages on your mobile softphone while traveling internationally.

Porting a Skype number

What devices can I access my account on?

What OS or hardware do I need to run Crazyphone?

What operating system does Crazyphone require? How much RAM? Do I need any special hardware?

Where are Crazytel's Data centers?

Crazytel's data centers are located in major cities around Australia (and a few internationally!). This geo-redundancy, combined with cutting-edge load balancing, ensures minimal interruptions if there's a system or server fault.

Multiple SIP Trunks with Multiple Extensions

Many Crazytel customers ask whether they need to purchase multiple SIP Trunks or Extensions when they have multiple phone numbers. This guide explains how Crazytel's system allows you to manage multiple phone numbers (DIDs) with just a single SIP Trunk or Extension.

Plan Management

How to change your plan with Crazytel

Channel Partner | Wholesale | Affiliate Referral - Commissions

MMS Support

Crazytel's support for MMS - what products do, and don't.

Changing 2FA Numbers

How to change your 2FA number on your Crazytel account

Call Forwarding Charges

All about call forwarding charges.

Crazytel IP Addresses

All about the IP Addresses Crazytel uses

Access Denied Errors

Inbound Call Problems

Can't receive inbound calls? This article covers the basics.

Crazytel Physical SIM FAQ - Crazy 5G plans, 4G data SIMs, eSIM and international roaming

FAQ for Crazytel physical SIM mobile plans: Crazy 5G plans on the Optus network, 4G data-only SIMs, Hybrid Prepaid billing, eSIM, VoLTE, WiFi calling, international roaming packs, activation and porting.

VoIP Plan overview

What VoIP Plans does Crazytel offer?

Legal Documents Repository

All about Crazytel's legal documents, and where to find them.

Sign up restrictions

Who can and can't sign up to Crazytel? What restrictions are in place?

Crazytel SIP Trunks vs CrazyPBX - ATA phones, plans and prices

Crazytel SIP trunks work directly with an ATA, IP phone or softphone without a PBX. Compare PAYG 50c/trunk, Crackers $35 and CrazyPBX Business $15/extension for one phone or a small office.

SMS Message Costs (Virtual Mobile Numbers)

SMS message costs, and how to calculate them

International Call Pricing

All about international call pricing and how to place international calls.

SIP Trunks vs CrazyPBX Extensions - quick comparison

Standard SIP works directly with an ATA or phone, no PBX required. Hybrid adds office calling; CrazyPBX supplies hosted extensions. See the full comparison for PAYG, Crackers and extension prices.

Understanding Codecs

A brief exposé on commonly found codecs -- nothing technical, only the basics!

No Sound on Calls (SIP Device, IP Phone, or Softphone)

No audio on calls, but not using the Crazyphone app? Check these before raising a heldesk ticket.

No Sound on Calls (Crazyphone)

No Audio on the Crazyphone app? Check these settings!

NetComm NF18-Mesh | No Caller ID Issue

This article provides instructions on how to stop NetComm NF18-Mesh devicesfrom showing 'Anonymous' on all outbound calls.

Realtime Network Status

All about the Network Status Page

Account Login Issues

This article covers common problems with signing into your account.

Call Drop Outs (30s+)

This article covers common causes for call drop-outs after 30s of call time.

Call Drop-outs (10-30s)

This article covers common causes for call drop-outs between 10 and 30 seconds. If your drop-out occurs after 30s, this is not the correct article.

Glossary of Terms

This article covers non-standard abbreviations and terms Crazytel uses.

How to Port Out your Mobile Number

This guide explains how to port your Virtual Mobile Number away from Crazytel.