How do I set the Prerecorded Greeting?

First of all, here is the main ONLINE SUPPORT page for your model:

http://www2.panasonic.com/consumer-electronics/support/Phones-Fax/Telephones/Expandable-Systems/model.KX-TG1033S


And here is a direct link to the ONLINE USER'S MANUAL for that model:

http://service.us.panasonic.com/OPERMANPDF/KXTG1032.pdf


To view the Support Page or the Owner's Manual with Operating Instructions just use your mouse to click on the link, which is the underlined and highlighted text just above. This will open a new web browser page automatically for you and allow you to view the information at the website indicated and the contents of the Owner's Manual.

You may need ADOBE READER installed on your computer to read PDF documents.
You can download this free at WWW.ADOBE.COM if necessary.
Click on the DOWNLOAD ADOBE READER button on right side of the ADOBE home page when you get there, then follow the onscreen instructions to install the software on your computer.

See page 26 of the manual for detailed instructions on how to operate the answering system on your phone.

Basically that section of the manual reads as follows:

Greeting message

When the unit answers a call, callersare greeted by a greeting message.
You can record your own greeting message or use a prerecorded greeting message.

Recording your greeting message.

You can record your own greeting message (max. 2 minutes and 30 seconds).
If you do not record a greeting message, a prerecorded greeting message is used.

1 Press the MENU button.

2 Scroll to ANSWERING DEVICE using the up and down arrow keys and then press OK.

3 Scroll to RECORD GREETING then press OK.

4 After the handset beeps, speak clearly about 20 cm (8 inches) away from the microphone.

5 To stop recording, press the OK button.

6 Then press the OFF button.


Using a prerecorded greeting message.

If you erase or do not record your own greeting message, the unit plays a prerecorded greeting message for callers and ask them to leave messages.


Playing back the greeting message.

1 Press the MENU button.

2 Scroll to ANSWERING DEVICE using the up and down arrow keys and then press OK.

3 Scroll to PLAY GREETING then press OK.

4 Then press OFF.


I hope that was helpful to you, good luck and take care.

Joe.

Here is the manual for your phone. You can download the manual and the instructions for setting up your answering machine are on page 43:

http://www.uniden.com/pdf/DECT1580-3om.pdf

Setting Up the Answering System
You can set up your answering system's features from the handset. Only one handset at a time can access the answering system menus.

Note: If you have multiple bases, select the base with answering system you want to access (see page 15).

Recording a Personal Greeting
Your answering system comes with a pre-recorded outgoing message or greeting that plays when you receive a call: "Hello, no one is available to take your call. Please leave a message after the tone." You can record your own personal outgoing greeting. Your recorded greeting must be between two seconds and thirty seconds long.

Press /mute. The system announces the number of new and old messages, then starts to play the messages unless it has no messages.

Press 5 to stop the announcements or message playback. You will hear intermittent beeps indicating that the system is in the command waiting mode.

Press 8 to start the recording. The system announces, "Record greeting." Begin recording after the announcement.

When you finish recording, press 8 again or press 5. You will hear a confirmation tone, and your recorded greeting plays back for you.

Selecting a Greeting

Once you have recorded a personal greeting, the phone automatically switches to your personal greeting. You can
also switch back and forth between the pre-recorded greeting and your own greeting at any time.

Press /mute. The system announces the number of new and old messages, then starts to play the messages unless it has no messages.

Press 5 to stop the announcements or message playback. You will hear intermittent beeps indicating that the system is in the command waiting mode.

Press 6. The system plays the current greeting.

You can record your own greeting message (max. 2 minutes) that is played when the answering system answers a call. If you do not record a greeting message, a prerecorded greeting message is used. 1 {GREETING REC} 2 Within 10 seconds, press {GREETING REC} again. 3 After the base unit beeps, speak clearly about 20 cm (8 inches) away from the MIC. 4 To stop recording, press {STOP}.

Recording your greeting
message
You can record your own greeting
message (max. 2 minutes). If you do not
record a greeting message, a
prerecorded greeting message is used.
1 {GREETING REC}
2 Within 10 seconds, press
{GREETING REC} again.
3 After the base unit beeps, speak
clearly about 20 cm (8 inches) away
from the MIC.
4 To stop recording, press {STOP}.

Greeting message
When the unit answers a call, callers are
greeted by a greeting message. You can
record your own greeting message or
use a pre-recorded greeting message.
Recording your greeting
message
You can record your own greeting
message (2 minutes max.).
1 {GREETING REC}
2 Within 10 seconds, press
{GREETING REC} again.
3 After the base unit beeps, speak
clearly about 20 cm (8 inches) away
from the MIC.
4 Press {?} (STOP) to stop recording.
Using a pre-recorded greeting
message
If you erase or do not record your own
greeting message, the unit plays a prerecorded
greeting message for callers
and asks them to leave messages. If the
message recording time (page 39) is set
to “Greeting only”, caller messages
are not recorded and the unit plays a
different pre-recorded greeting message
asking callers to call again.
Playing back the greeting
message
Press {GREETING CHECK}.
Erasing your greeting
message
If you erase your own greeting message,
the unit plays a pre-recorded greeting
message for callers.
Press {GREETING CHECK}, and then
press {ERASE} while your greeting
message is playing.
Listening to messages
using the base unit
When new messages have been
recorded, the message indicator on the
base unit flashes.
Press {6}.
L If new messages have been recorded,
the base unit plays back new
messages.
L If there are no new messages, the
base unit plays back all messages.
Operating the answering
system
Key Operation
{^} or {V} Adjust the speaker
volume
{7} Repeat message
(during playback)*1
{8} Skip message
(during playback)
{?}
(STOP)
Pause message
– To resume playback,
press {6}.
– To stop playback
completely, press
{?} (STOP) again.
{ERASE} Erase currently playing
message
*1 If pressed within the first 5 seconds of
a message, the previous message is
played.

check if this works and tell me if any issues

Greeting message
When the unit answers a call, callers
are greeted by a greeting message. You
can record your own greeting message
or use a prerecorded greeting
message.
Recording your greeting
message
You can record your own greeting
message (max. 2 minutes and 30
seconds). If you do not record a
greeting message, a prerecorded
greeting message is used.
1 {MENU}
2 {V}/{^}: “Answering device” i
{OK}
3 {V}/{^}: “Record greeting” i
{OK}
4 After the handset beeps, speak
clearly about 20 cm (8 inches) away
from the microphone.
5 To stop recording, press {OK}.
6 {OFF}
Using a prerecorded greeting
message
If you erase or do not record your own
greeting message, the unit plays a
prerecorded greeting message for
callers and ask them to leave
messages.

Hello folks, I offer no guarantee on this but it worked for me.
1. record own greetings >menu>answering device> record greeting>then after recording own greetings press OK
2. Erase own greeting just recorded >menu>answe...device>erase messa...>erase greet...>Ok
3. Then try Menu> answering device>play greeting....voila. Prerecorded message plays.
Hope This helps.

There are two models - The TRU8885 and the TRU8885-2 -
For the TRU8885 the manual PDF form >>>Click Here<<<
The solution is on page 24 + 57 It starts on Pg 24 as...

Record Greeting allows you to record a personal outgoing message (greeting) which
the answering system automatically plays when you receive a call.

1) Enter the Answring Setup menu, and then the
Record Greeting sub-menu (see "Entering the
Menu" on page 16). To record greeting press
[STA RT] appears.

2) Press the START soft key. You will hear “Record Greeting.“ The message counter
displays 30 and then begins to count down.

3) Position yourself near the base microphone and record your greeting.

4) When you are finished recording, press the STOP soft key. Your greeting will
playback for confirmation.

Selecting Your Greeting (Base only)

Select Greeting allows you to choose between the two outgoing messages, a prerecorded
message or your own greeting.

1) Enter the Answ. Setup menu, and then the
Select Greeting submenu (see "Entering the
Menu” on page 16). P lay back greetin g
appears, and the current outgoing message is
played. LCD is an example if you recorded your greeting.

2) Once you have recorded a personal greeting, press the CHANGE soft key to
choose the greeting. The selected outgoing message is played. Each time you
press the CHANGE soft key, the phone switches the outgoing message between
the prerecorded and the personal outgoing message.

There is more on the PDF - Just ask if you need more

For the TRU8885-2 is essentially the same. The manual PDF form >>>Click Here<<<

If we need to dig further, just ask! :) We are just a mouse click away!
Thanks
Len

I read thru the manual. There is nothing bout recovery of factory messages. If you recorded your own, try deleting it. Or unplug the base from power and try a reset. This is from the manual. At the end, I gave you a link to the manual!

Using a pre-recorded greeting
message
If you erase or do not record your own
greeting message, the unit plays a prerecorded
greeting message for callers
and asks them to leave messages. If the
message recording time (page 39) is set
to “Greeting only”, caller messages
are not recorded and the unit plays a
different pre-recorded greeting message
asking callers to call again.


http://service.us.panasonic.com/OPERMANPDF/KXTG9331.PDF

If you press the Greeting Check button and only the pre-recorded greeting plays back, The other greeting has been accidentally erased.