Softwere probleb samsung p900 pls help

[bycile]

Hello good people

My name is Cile

I am a collector of old phones, some rare phones, etc

i own a samsung p900 and p910.

My problem is them my samsung p900 is rebooting all the time, when i start him he restart it self after few seconds, so I think it is a software problem.

can i flash p900 with out a box....???? i dont hawe the money for thet (80euro -200euro) i have the regular usb cable and rs232 cable for samsung(p900, d600, e720,e730,etc)

http://www.nowgsm.com/s200cable.htm
(rs232)

can i download some program and softwere for p900 and flash it with rs232? or usb???? can some one help me.....

i love thet phone and I'm sorry that I can not use it no more

and one more question i own a samsung p910, and when i put sim card in it it wont start up(its saying to put sim) i heard the p910 requires 3G sim card(128bit sim card)? is thet true? can i bypass thet? or i have to have thet sim card?

But please help me with samsung p900, help me flash it.

best regards cile