Uniden DECT2080 - the Key - square key wont' work at all

I believe you are asking how to delete the call ID log<?>.

If you can identifiy the (caller ID/right) key on the large round multifunction button of the handset, do the following.

To delete all the Caller ID numbers, press (caller ID/right) key when the phone is in standby. Press MENU/SELECT and select
Delete All. When the phone asks you to confirm, select Yes.

Notes:
• When you delete a Caller ID number, you delete it permanently.
• Caller ID numbers are stored separately in each handset. Deleting a record from one handset will not delete
the record from any other handsets.

From your handset, you just have to press the mute button, your phone should start telling you the time, date, ect. press the #5 key and then the #8 key and start recording your message. When finished press the # 8 key again. Hope this helps

To set up call id you need to enter programming . Programming is done on M7310, M7324, and T7316 sets only. Press the feature key followed by **266344.When prompted to enter the password enter 266344.
The screen should say TERMINALS&SETS. The 4 top line/feature keys are now used for programming.
At the terminals&sets prompt, press the show key (top right arrow). The display should now ask for an extension number. Enter extension number you wish to program call log on. Press the show key (top right arrow)
Press the next key (bottom right arrow) 5 times. The display should say TELCO FEATURES.
Press the show key (top right arrow) 2 times. The display should say CALLED ID: N(or Y)Press the change key til it says Y.
press the release key.

You can find the manual here:
http://www.uniden.com/pdf/DECT2080om.pdf

To set up call id you need to enter programming . Programming is done on M7310, M7324, and T7316 sets only. Press the feature key followed by **266344.When prompted to enter the password enter 266344.
The screen should say TERMINALS&SETS. The 4 top line/feature keys are now used for programming.
At the terminals&sets prompt, press the show key (top right arrow). The display should now ask for an extension number. Enter extension number you wish to program call log on. Press the show key (top right arrow)
Press the next key (bottom right arrow) 5 times. The display should say TELCO FEATURES.
Press the show key (top right arrow) 2 times. The display should say CALLED ID: N(or Y)Press the change key til it says Y.
press the release key.

I fixed mine by using tiny pieces of tinfoil. Just take the back plate off (held by 2 screws under the battery cover). Then remove the circuit board (one screw on top). You'll find that the Square Button is in deed different, using 4 rubber contacts that apparently wear out. So, just cut some tiny pieces of tinfoli to cover each of the 4 black contacts. Glue them in place with a dab of silicone... Viola!!!

These phones use a "Shared" memory, the CID information and the Phone book information share the same memory chip. If you clean out the caller ID data you should be able to load more numbers in the phone book. Since you have an 8885 I am assuming you have TCX800 or TCX905 handset(s), to clear the CID memory, Follow these steps:

Deleting Information from the Caller ID List
1) When the phone is in standby mode, view the Caller ID
information to be deleted (see "Viewing the Caller ID
List" on page 50).
2) Press the DELETE soft key. De let e C all er ID appears.
3) Press volume up/down to choose Yes.
4) Press the OK soft key. You will hear a confirmation tone.

To delete all the CID information follow these steps:

Deleting all Caller ID names/numbers
1) When the phone is in standby mode, press cid.
Press the DELETE soft key. De let e A ll? appears.
2) Press volume up/down to choose Y es.
3) Press the OK soft key. You will hear a confirmation tone

To set up call id you need to enter programming by pressing the feature key followed by **266344.When prompted to enter the password enter 266344.
The screen should say TERMINALS&SETS. The 4 top line/feature keys are now used for programming.
At the terminals&sets prompt, press the show key (top right arrow). The display should now ask for an extension number. Enter extension number you wish to program call log on. Press the show key (top right arrow)
Press the next key (bottom right arrow) 5 times. The display should say TELCO FEATURES.
Press the show key (top right arrow) 2 times. The display should say CALLED ID: N(or Y)Press the change key til it says Y.
press the release key.
that should do it providing you have caller id service though your local telco provider.

To set up call id you need to enter programming by pressing the feature key followed by **266344.When prompted to enter the password enter 266344.
The screen should say TERMINALS&SETS. The 4 top line/feature keys are now used for programming.
At the terminals&sets prompt, press the show key (top right arrow). The display should now ask for an extension number. Enter extension number you wish to program call log on. Press the show key (top right arrow)
Press the next key (bottom right arrow) 5 times. The display should say TELCO FEATURES.
Press the show key (top right arrow) 2 times. The display should say CALLED ID: N(or Y)Press the change key til it says Y.
press the release key.
that should do it providing you have caller id service though your local telco provider.

check if you have a manual. from there search up in the manual caller id settings. you have turned off the caller id option.