My siemens 8800 handset say "searching" when I try to register with my siemens base set?

SOURCE: Handset flashes "searching" and has stopped working

Did you already try cleaning the connections on the phone and the base with alcohol on a Q-tip? Make sure the connections on the phone are touching the base propely.

SOURCE: Handset can't find base.

I just got a 3rd handset for the same phone system and were having the same error message,,, the at&t help line does not know what it is,.,. We returned it once and got another one because of the same problems, and were still having it.. AT & T help line said to return it again and try another one .. then he actually said to replace the whole phone system .. thats easier said than done! we paid 199 plus tax on the system and then another 81.00 for the third handset!

SOURCE: Can't get handset to register

Panasonic manual says hit the Intercom button and when the "OK" thing comes on the LCD screen, push the button underneath the OK.

SOURCE: Handset not registering with base

You could try to clear all the memory from the base unit and start again!!!
Instructions to clear phone (Uniden 8855).
1. Go to your base unit.
2. Put your flip phone in the cradle.
3. Press down and hold down (AT ALL TIMES) the end (find hs) button.
4. Whilst holding down this button, take the power plug out of the wall.
5. Whilst still holding down the end (find hs) button, plug the power back in.
6. When you hear a beep from the base unit system.
7. Let go of the end (find hs) button.
8. Your phone memory should be cleared now and you are ready to repeat the process of registering your base and additional handsets.

SOURCE: my phone keeps saying unable to connect

is your phone about a year old? It may be the battery. The vtech phones have weak batteries that clunk out after about a year and you'll get dropped calls, looking for base etc... The phone still appears to be working and the battery indicator tells you it's charged, but the battery is too weak to keep the wireless connection going.

Had the same problem and replaced the battery. budgetbatteries.com had the cheapest ones. But it's a knockoff, so I don't know how long it will last. So far it's been 3 months and the problems are gone. I would try that first and see how it goes. I paid about $15 including shipping. If you buy it from vtech it's at least double...