No noise more! Attention to the manufacturer number. 612014003 eighth!

So there is a DSL contract extension was once again into the house.
Whether AVM has probably put something new on the DECT range on its feet?
So have extended with 1und1 and Fritz! Box 7490 get "paid".

A FritzFon C4 next MediaMarkt ordered to do so.
Once home: perfect chaos.
The C4 proved despite the latest firmware to 7490 and C4 as extremely poor.

But hope sprouted: the Internet (IPPF) was THE SOLUTION!

So now back to Media Markt.
The seller wanted me there just do not believe that the Erstseriengeräte with the manufacturer number. 612014001 a noise, whistling and Fiepkonzert during a call hold.
Here AVM had probably already responded appropriately to massive customer protests, a new series launched.
Just not the dealer advised accordingly.

In the just-unwrapped Warenbox there was also a pack of C4 with the manufacturer number. 612014002nd
Small difference but big impact.
Except for a slight background noise is everything OK ... not too long.

After 1 month of the front of the chassis frame at the thin beam collapsed on the display,
without violence would like submitted to the falling down of the C4.
Summary: clear manufacturing and / or material defects.

After much back-and-forth at the Media Markt (Guess own fault), and as yet more customers
log on with the same mistakes complaint claims that C4 was repeated exchanged.

Although the ... 002er devices at the beginning nice and cracks appearance:
In the current state can ONLY (!) The C4 with the manufacturer number. 612014003 are recommended to buy!

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The manufacturer no. is right on edge next to the bar code label on the box.
Unfortunately printed in fairly small type.
(Barcode = many black long dashes)
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Meanwhile, there is also the C4 with 1und1 in customer hardware store.
Price: about 49 EURO
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Reason for the annoying background noise:
- Unsuitable coils + capacitors (. 612 014 002 from HstNr eliminated)
- Incorrect display control (firmware 3:29 eliminates)
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Currently (03.09.2014) are C4 with the manufacturer number. 612014003 in sales.
In the C4 with the manufacturer number. ... 4002 may cause stress fractures
come on top shell material.
That applies, unfortunately, to the Act. Charge to 4003.
In addition a new C4 firmware 3:34 (6:20 in FritzBox firmware included).
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22/09/2014:
Occasionally, a red streak coming along on the Caller Picture Caller
to light. This should be resolved according to the changelog for Firmware 3:34 actually.
Well, sometime in the next firmware version ...
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10/17/2014:
Firmware 3:35 Available
Fixed problems with its own ringtone -
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02/07/2015:
Laboratory firmware 3:48 Available
- Included in the newest laboratory firmware the Fritz box 7490
- It is now even more font selectable
- The "home screens" menu to get back to the home screen with OK
- AB-settings can be selected as a favorite
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22/03/2015:
Laboratory firmware 3:49 Available