Useful phone software improvement

I bought the phone because I needed a robust, loud machine with no frills for the work. It was quite inexpensive (about 30EUR incl. Shipping) and is worth the price anyway. The hardware is fine, the operation could be significantly better by more care when programming the software.

The following is a simple plus minus-list:

+ Price
+ Robust hardware
+ Store with USB Power Adapter
+ No internet key
+ Easy to read Monohrome display (but at best average, there are better)
+ If you know what you're looking for, you get all the features out quickly
+ Essential functions available (alarm clock, calendar, calculator)

- Strange and unintuitive menu navigation (confirm times with the right, sometimes to the left, sometimes to the central button)
- Fully redundant confirmation screens after each setting change
- In the phonebook, only one phone number for each entry, not vCard standard
- In the calendar days of abbreviations English name
- In calendar entries do not simply from the weekly overview with one click callable
- The calendar is no free choice of the alarm function (defined intervals impractical)
- In writing function no simple switch between predictive text and traditional input method (via menu)
- Ringtones atrocious, but polyphonic
- No communication with the outside world, to similar phone numbers, calendar data, ring tones swap - neither IR nor PcSync nor Bluetooth
- No wireless headsets used
- No countdown program (that's as simple and had been very early Nokia mobile phones), I had actually often similar to egg cooking used
- Display always out - you never know if your phone still has juice and can not even just looking at the clock
- When activating, instead of the standard screens, a screen with information, how to pick up the key lock shown (time!)
- Clock too small
- Analog (like old Siemens phones) exists but is not readable because too small ...

Just the simple phones are indeed a lot of business people used (among other things because in some firms cameras are veroten) - a simple way to communicate via USB would make the phone much more usable. Expected you really think that the customer again enters all contacts manually in its new phone?

Conclusion: with zero additional investment that could have been a better phone (menus), with little additional investment (USB Sync) it would have been a super-phone.