In addition, for all telephones a lot of noise was heard. When connected to the original station communication was clear. According to AVM Support can not change that, because of the DECT standard defines only certain functions. The rest is a matter of compatibility. Thus, had the 7330 unfortunately back to Amazon. My now ordered 7390 by the way, none of these problems. At least the three Gigaset phones show all of the caller's number. The agreement is clearly better. Obviously, the 7330 uses a different phone hardware as the AVM top device.
Conclusion: If you value the Telefonfunkton, buying better the 7390 or updates hopes to improve by firmware.