How can i reset my Gigaset A340 - Siemens Gigaset 4000 Phone

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwiw_ry98vL-AhUTOH0KHX0VBmEQFnoECBYQAQ&url=https%3A%2F%2Fservice.gigaset.com%2Fen%2Fsupport%2Fsolutions%2Farticles%2F75000057196-reset-gigaset-phones-to-factory-settings-perform-basic-reset&usg=AOvVaw3whmznDEpjPDEBy7I2hxF2

Hi,

To reset the Gigaset 2420 Pin
At "System Settings" in the Menu press *65# then press the Select button.
"System PIN Reset" will be displayed (if the PIN was not already the default).
The default PIN is 0000.

Goodluck..

http://www.hardreset.info/devices/gigaset/gigaset-qv830/

www.lg.com/us/support

YOU SHOULD HARD RESET THE UNIT

When restoring factory settings:
u Handsets are de-registered
- When resetting via the menu:
all Gigaset handsets
- When resetting using the key on the
base station: also all handsets of
other GAP capable devices
u Individual settings are reset
u All lists are deleted
u The system PIN is reset to the original
code 0000
u Eco Mode+ is deactivated
Only the date and time are retained.
Resetting the base station via the
menu
₪ Settings ₪ Base ₪ Base Reset
§Menu§
§OK§
Press the display key to confirm
SIEMENS Gigaset C380 User Giude Restoring The Base Station To The Factory...

1. I forgot the PIN number on my Gigaset 2XXX system base station. What can I do?
   Please complete the following steps to reset the system PIN on 2XXX back to 0000. On the system base station:
   

• Press MENU.
  
• Scroll to SYSTEM SETTINGS but do not press SELECT.
• On the keypad, enter *65# (Star, 6, 5, Pound).
• It will display "SYSTEM PIN RESET" and return to the idle screen.
• Note: The base station system PIN will be reset to 0000
  
  

1. I forgot the PIN number on my Gigaset 2XXX cordless handset. What can I do?
   Please complete the following steps to reset the cordless handset PIN on the 2XXX back to 0000.
   

• Press MENU.
  
• Scroll to MOBILE SETTINGS and press SELECT.
• Scroll to LOCAL SETTINGS and press SELECT.
• Scroll to CHANGE PIN and press SELECT.
• On the keypad, enter *65# (Star, 6, 5, Pound).
• Note: The handset PIN will be reset to 0000
  
  
  

http://gigaset.com/shc/0,1935,hq_en_0_23012_rArNrNrNrN_prodId:15585,00.html

Click on the above towards the page bottom select your phone.
Hope it helps!

Usually at the back of the modem has an inside button (it has the tag "reset") that u can push it with the help of a object that has a point. (e.g pencil).

1. Turn the handset off by pressing and holding the PWR key.
   
2. While holding down the keys 1, 4, and 7, turn the handset back on.
   
3. It will display "Handset Service".
   
4. While this message is displayed, type in the numbers 4 6 8 5 4 6 3 (the word "hotline") on the number pad.
   
5. The phrase "Settings Reset to Default" for a second or two and the handset will power itself off.
   

Note: When you turn the handset back on, the handset PIN will be reset to 0000.

This may help
http://www.imaging-resource.com/PRODS/A340/A34A.HTM