Samsung mobile sgh-i640v not working properly display after any call call failed and push camera key display message unable to connect camera

just turn on the phone without sim card, then type the folowing
#*7337# = EEPROM Reset (Unlock and Resets Wap Settings) this will unlock your phone. then u type *#7465625# to check and see then it should display network lock off...then turn off your phone and insert sim card it should work.

Type the code below on your mobile main screen after you remove the sim card:
*2767*3855#

go to games and more folder click on options select advanced then select connections then select ur connection all the networking application like opera will be working.

ur mobile have a inner strip for providing signals to the display, microphone ,speaker & camera the person who tld u that he has replace ur display might have changed the stripe(cable) & it is not properly fitted thats why the camera is not working

Your antenna is not ok. It is catching signals from the surroundings and starts vibrating... when it is not Ur message or call then it do not displays it on your mobile.

try an antivirus called net protector . load net protector on your main pc, use a cable to connect your mobile to pc using a compatible software for data transfer.

mobile will get detected in the antivirus software,SCAN YOUR MOBILE may be u are lucky to get blue tooth woking , if the file has come through blue tooth netwoking , pushed by some one when blue tooth was on some time. OTHER WISE do a factory reset and save all data first.
if this too fails then the blue tooth hardware/software has to be rectified.

Contact your network they should be able to send the correct settings for the internet to your handset.

sounds like you need to uninstall the software, reinstall it and then connect your phone.  If you are usng the front USB panels, try the back ones.  Sometime the front connectors are USB1 and are not fast enough.

Since that is a smart phone, there should be a place to set up your push mail. It's usually found in your messages folder.

Contact Samsung, or your mobile provider for a software update. Alternatively you could flash the software yourself.