Sanyo SCP-4000 - Manual (Page 25)

15
Calling experience
When you use your phone on other CDMA networks, your calling
experience and call quality will be similar to what you experience
when making calls from within the digital Sprint PCS Nationwide
Network. Although certain calling features may not be available,
your phone calls are still private and secure.
When you use your phone on analog cellular networks, your
experience will be different. Analog cellular roaming will be
similar to the quality provided by conventional analog cellular
carriers today. Although you will still have the convenience of
being able to make and receive calls, here are some differences
you can expect:
You are more likely to experience static, cross-talk, fade-out
and dropped calls.
Some calling features such as Caller ID and the message
waiting indicator that are standard within the
Sprint PCS Nationwide Network may be unavailable.
You will experience the same security and privacy risks
(eavesdropping and phone number cloning) that exist with
conventional analog cellular services today.
Battery life will be shorter when you use your phone for analog
cellular roaming than when you use it on a CDMA network.