LG MM-535 Owner's Manual page 62

When you roam on analog networks, you will experience a similar
quality provided by other analog carriers today. Although some
features, such as Sprint PCS Vision and Sprint PCS Voice Command,
will be unavailable, you can still make and receive calls and access
voicemail. If you are accustomed to Sprint PCS Service, you may
notice some of the following differences when using analog service:
You are more likely to experience static, cross-talk, fade-out, and
dropped calls.
Some features which are standard on the enhanced
Sprint Nationwide PCS Network, such as call waiting,
Sprint PCS Vision, and direct international dialing, are
unavailable.
Though callers can leave voicemail messages while you are
roaming, you will not receive notification until you return to the
Sprint Nationwide PCS Network. (See "Checking for Voicemail
Messages While Roaming" on page 53).
There are security and privacy risks (eavesdropping and cloning)
that exist with conventional analog services today.
Your battery's charge will deplete more quickly and you will need
to recharge it more often when you use your phone for analog
roaming.