Q: What are GSM and CDMA?
A: Both are common technologies used by cell-phone networks for transmitting information: GSM stands for Global System for Mobile Communications, and CDMA stands for Code Division Multiple Access.

Q: What is the difference between GSM and CDMA?
A: They are two different wireless technologies and are not compatible with each other. A GSM cell phone cannot operate using a CDMA network and vice versa. Also, CDMA phones in North America do not utilize SIM cards. GSM service providers in the U.S. include T-Mobile and Cingular/AT&T, while Verizon Wireless and Sprint use CDMA technology.

Q: What is Tri-band and Dual-band?
A: A tri-band phone operates at three supported frequencies, such as 900/1800/1900 MHz or 850/1800/1900 MHz. A dual-band phone operates at two frequencies, such as 850/1900 MHz or 900/1800 MHz.

Q: I want to use my Hop-on phone in another country. What do I need?
A: Since GSM is the most prevalent system worldwide, a GSM phone is recommended. However, the band used in the United States is different from that of Europe or Asia. You need to make sure that your phone supports the band used in the country. Below is a list of bands used worldwide:

Area	Band
USA/Canada	1900
Europe	900/1800
Middle East	900/1800
Africa	900/1800
Asia	900/1800
Australia/New Zealand	900/1800
Caribbean	800/900

Q: What is a SIM (Subscriber Identification Module) card?
A: The SIM card is what allows your cell phone to access the network. It contains your saved phone numbers, and is transferable if you switch phones. Simply switch the SIM card into the new phone and your phone number and other settings stay the same.

Q: Does my Hop-on phone include a SIM card?
A: No, you will have to obtain a prepaid SIM card from a local service provider using the same network as your phone.

Q: What is an "unlocked" cell phone?
A: With an unlocked cell phone, you can use another service provider's SIM card, provided that it is on the same network. With a locked phone, you can only use a certain service provider with that phone.

Q: Can I download ring tones and pictures to my Hop-on phone?
A: Your Hop-on phone must be capable of downloading ring tones and pictures. Please refer to the product specifications of your phone.

Q: What is a polyphonic ring tone?
A: Polyphonic tones use multiple tones instead of just a single tone to make a melody.

Q: What is the difference between "talk time" and "standby time?"
A: Talk time is the total time a battery can power a phone while the cell phone is being used. Standby time is when the phone is powered on and there is no activity. Because talk time requires more power, it is much shorter than standby time.