You're right, CDMA is a fairly obscure system. Outside Algeria, Angola, Argentina, Aruba, Australia, Azerbaijan, Bahamas, Bangladesh, Barbados, Belarus, Belize, Bermuda, Botswana, Brazil, Cambodia, Cameroon, Canada, Cayman Islands, Chile, China, Colombia, Congo, Czech Republic, Denmark, Dominican Republic, Ecuador, Egypt, El Salvador, Ethiopia, Fiji, Finland, Gambia, Georgia, Ghana, Guatemala, Haiti, Honduras, Hong Kong, India, Indonesia, Ireland, Israel, Ivory Coast, Jamaica, Japan, Kazakhstan, Kenya, Kuwait, Kyrgyzstan, Laos, Latvia, Macau, Madagascar, Malaysia, Mali, Mauritania, Mexico, Moldova, Mongolia, Mozambique, Myanmar, Namibia, Nepal, Netherland Antilles, New Zealand, Nicaragua, Niger, Nigeria, Norway, Oman, Pakistan, Panama, Peru, Philippines, Poland, Portugal, Puerto Rico, Romania, Russia, Rwanda, Saipan, Saudi Arabia, South Korea, Sri Lanka, Sweden, Taiwan, Tajikstan, Tanzania, Thailand, Trinidad & Tobago, Uganda, Ukraine, US, Uruguay, Uzbekistan, Venezuela, Viet Nam, Yemen, and Zambia, it isn't used.
The size difference isn't what it used to be, modern ones are pretty small.
