Nokia 2600, can't open, and turning off when turned on.

Edited to remove SHOUTING. Please turn off caps lock! Also it appears to BL-5BT so I edited that as well

That is the model number for a Lithium Battery. Please don't open up lithium batteries as they burst into flames.

https://www.google.com/search?q=NOKIA+BT-5BT+2600C-2

Your phone appears to be this

Nokia 2600 classic - Full phone specifications - GSMArena.com

https://www.gsmarena.com > nokia_2600_classic-2221

Nokia 2600 classic MORE PICTURES. Released 2008, March 73.2g, 12mm thickness. Feature phone ... Battery, Type, Removable Li-Ion 870 mAh battery (BL-5BT).

To get into the phone, the search query would be

make model tear down or 'disassembly'.

...

Software problem. Check with Nokia service station.

get a frimwar update, there is problem and it is the wrong firmware for you fone

i have nokia 2600c-2 .i am forget my security password.my imei no. is 351946035382307.

try to put back the old sim card.. if u have the same problem with both the sim cards, then it must ba the display proble. your battery can be checked by inserting into another similar compatible phone. PHILIP

hi,your phone battery is not connected to connectors or ur battery is dead.i give two options
1.try to connect the battery & connectors.
2.replace new orginal battery.
thank you.

try to delete some of your text messages. free up some spaces for your phone memory. you can back it up if the messages are really that important to you by using nokia pc suite.

hello
1_ can you save your formation in other phone .
2_that code format your phone for Nokia only
3_ *#7780# if you know your security numbers use it. if you don’t know it use 12345
4_ other numbers *#7370# and the security n ......
and look if the problem is solve it
because after this . you have like a new mobile

1.Check the device's battery level for at least two bars of strength.
2.If the battery level is low, charge the battery.
3.If the issue is not resolved, remove the back cover.
4.Remove the battery.
5.Wait 10 seconds.
6.Press and hold the W key.
7.While pressing down the W key, re-insert the battery.
•The device restarts and after approximately 15 seconds, the 'Recovery' screen appears
•Release the power button but *continue holding the home button*, for another 30 seconds.
S

This the problem with the corrupted phone software. Get it reinstalled from local phone service center it fix the issue.........