Windows System Requirements
Windows 98SE, Me, 2000, XP, XP Professional

Macintosh System Requirements
OSX 10.2.8 and above

Supported Carriers (US and Canada only)
ATT, T-Mobile, Cingular, Sprint PCS, Bell Canada, Cellular One, Rogers ATT, and FIDO. Adding support in the UK and the EU by Fall 2005.

Phone Requirements
Internet and text messaging enabled. Voice tone / true tone compatible. Supported phones include models from Audiovox, Hitatchi, LG, Motorola, Nokia, Samsung, Sanyo, Sharp, Siemens, Sony Ericcson and Toshiba

Corporate Firewalls
MyToneCreator Ringtone Maker (MTCRM) is targeted to a home user and works with the vast majority of home firewalls. It is not a corporate product, and is not designed to be used at work. MTCRM sends a text message to your phone with a link back to the ringtone on your PC or Mac. If you find yourself sitting behind a corporate firewall, that text message might be blocked. You may see a message saying "trying to connect" on your MTCRM screen which then simply times out. If you see this message, your corporate firewall is probably the cause. We know that most home firewalls including those from Linksys, D-Link, Microsoft, SMC, etc. are not problematic.