20 Most Recent Siemens Gigaset 4200 Cordless Expansion Handset Questions & Answers

The handset should be returned to the charging station, let it set for a few seconds. If this is a satellite phone, make sure the main phone "base unit" is connected to phone outlet and plugged in. After the phone has established its physical connection with the base again you can remove it and use it like normal.

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try replacing the batteries. Sometimes the flashing is just because it's not charging them.
I believe the Siemens uses standard rechargable AA batteries?

I went through this exercise with a Siemens Gigaset 8800. The solution is to DE-register the handset first. Then register it with your base. This function can likely be accessed in the handset menu. The phone you purchased is apparently still registered to the previous user's base.

Unplug the batteries for 30-45 seconds. Reinstall, and attempt to re-register the handsets to the base.

Have the phones been abused? got wet?

First troubleshooting I would suggest to remove the battery for a moment 5-10 minutes and then try it again.

I am having the exact same issue! I tested the jack with another phone and it works. It is something in the phone. I suspect there is a "clear" button somewhere - but can't find the owners manual.

I am sorry but while many phones can be opened with some common tools and a little dexterity, that phone model is manufactured and designed in a way where it cannot be opened by a consumer or even a gifted techie without destroying its integrity. It has no screws, and the method to open it without destroying it is completely based upon muscle memory and a specific tool. In addition, even if you were to open it without destroying the plastic you would clean the keys only to have them still barely work. I train technicians to open them, and I have to sit them down with bad ones that they can destroy to practice opening them without tearing them up. Once the plastic tabs that hold them together are busted, the phone won't stay together properly and then your costs just went up to replace the plastic once you finally get it to the repair facility. So the best advice I can give in this case is to send it in for repair so the keypad can be fixed and upgraded. If you go to the Siemens website, and reach the Gigaset area, look for the FAQs and they can direct you to a repair source. Their global site is pretty large, so if you get lost, you can google Siemens Cordless Repair to find a solution.

Even at its factory defaults your Siemens handset should be showing the caller id after the second ring. Look at your time and date on the phone, if they are not accurate then the caller id signal is not coming through since when activated caller id will not only give you the caller information, but it syncs with the telephone companys clock too. If I were there, I would take a phone that is known to have its caller id working and plug it in your line and see if caller id shows up on it. If it does show caller id, then there is something wrong with your Siemens base. If it does not, then your phone company dropped the ball and caller id is not activated. Then I would take the Siemens phone to another line (neighbor or friend) that has working caller id and plug my Siemens into it and see if it shows up. Doing all that will isolate your problem, I guarantee it.