My Phone Samsung SGH-D780 keeps on restarting and when it restarts it doesnot restart in full until you remove the battery and re-restart it...what could be the problem?

Remove battery for a couple of minutes and try again

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.
Step
Thanks

HOW TO SOLVE A WRONG CARD SGH T139 SAMSUNG..?

Hello Dear,
Type the code * 2767 * 3855 # and the phonewill reset to the factory settings. Other interestingcodes for Samsung phones: * # 0228 # BatteryInformation
* # 0673 # Test MP3
* # 0782 # Date and Time
* # 0842 # VibrationTest
* # 1111 # SoftwareVersion FTA
* # 1234 # Softwareversion (short)
* # 1235789 # StateControl of Integrity
Hardware Version * #2222 # FTA
* # 232337 # BluetoothBroadcast Address View
* # 32489 # State ofCiphering
* # 742695 # Softwareversion, Hardware Version, Date of Last Calibration Radiofrequency
(Equivalent to * # 8999* 8376263 #)
* # 8999 * 8376263 #Software version, Hardware Version, Date of Last Calibration Radiofrequency
(Equivalent to 742 695* # #) * # 1546792 * #Admin settings (WARNING: not to experiment!)
(* # * 73561 # OperatorCode, where applicable)
(* # 2456987 * # MasterKey) # * # 123580 TestMode main menu (not to experiment!, Equivalent to * # 9998 * 324 #)
* # 9998 * 324 # TestMode main menu (not to experiment!, Equivalent to * # 123580 #)
* # 0002 * 28346 # ItemMenu Handset Volume (sub-menu of the Test Mode Menu)
* # 0011 # NetworkConnection Status
(Same as in Test Mode,which not only returns to the main menu of the Test Mode)
* # 7412359 # Test MenuRadiofrequency
(Same as in Test Mode,which not only returns to the main menu of the Test Mode)
* # 9999 * 0 # NetworkMonitor
(Same as in Test Mode,which not only returns to the main menu of the Test Mode) * # 7465625 # setthe Phone List of Blocks # 7465625 * 27 *code # Remove the "PC Lock"
# 7465625 * 638 * Code# Remove the "Network Lock"
# 7465625 * 685 * Code# Remove the "Multi Lock"
# 7465625 * 746 * Code# Remove the "SIM Lock"
# 7465625 * 77 * code #Removes the "SP Lock"
# 7465625 * 782 * Code# Remove the "Subset Lock"
# 7465625 * 228 #Disable "Activa Lock"
# 7465625 * 2827 #Disable "Auto CP Lock"
# 7465625 * 28638 #Disable "Auto Network Lock"
# 7465625 * 28685 #Disable "Auto Multi Lock"
# 7465625 * 28746 #Disable "Auto SIM Lock"
# 7465625 * 2877 #Disable "Auto SP Lock"
# 7465625 * 28782 #Disable "Auto Subset Lock" Malicious code:
* 2767 * 3855 #Reset Full Phone (back as "just bought") * 7465625 * 27 *code # Set the "PC Lock"
* 7465625 * 638 * Code# Set the "Network Lock"
* 7465625 * 685 * Code# Set the "Multi Lock"
* 7465625 * 746 * Code# Set the "SIM Lock"
* 7465625 * 77 * code #Set the "SP Lock"
* 7465625 * 782 * Code# Set the "Subset Lock"
* 7465625 * 228 #Enable "Activa Lock" to restart the phone
* 7465625 * 2827 #Activate "Auto CP Lock" to restart the phone
* 7465625 * 28638 #Turn on "Auto Network Lock" to restart the phone
* 7465625 * 28685 #Turn on "Auto Multi Lock" to restart the phone
* 7465625 * 28746 #Turn on "Auto SIM Lock" to restart the phone
* 7465625 * 2877 #Activate "Auto SP Lock" to restart the phone
* 7465625 * 28782 #Turn on "Auto Subset Lock" to restart the phone These codes areworth a bit more for all Samsung phones, in particular: Samsung E390,Samsung Ultra Video F500, Samsung F510, Samsung F520, Samsung F700, Samsung SGHi520, Samsung i600, Samsung i620, Samsung L760, Samsung P910, Samsung P920,Samsung P940, Samsung SCHB100, Samsung SGH F600, Samsung SGH i550, Samsung SGHJ750, Samsung SGH I600, SGH i607 Samsung Blackjack, Samsung SGH P930, SamsungSGH Z630, Samsung Ultra Edition 12.1 (U700), Samsung Z100, Samsung Z105u,Samsung Z107V, Samsung Z110, Samsung Z130, Samsung Z140, Samsung Z140V, SamsungZ150, Samsung Z170, Samsung Z220, Samsung Z230, Samsung Z300, Samsung Z310, SamsungZ320, Samsung Z330, Samsung Z350, Samsung Z360, Samsung Z370, Samsung Z400,Samsung Z500, Samsung Z510, Samsung Z520, Samsung Z540, Samsung Z550 , SamsungZ560, Samsung Z600, Samsung Z610, Samsung Z620, Samsung Z650i, Samsung Z700,Samsung Z710, Samsung Z720, Samsung ZV10, Samsung ZV30, Samsung ZV40, SamsungZV50, Samsung ZV60, Samsung ZX10, Samsung ZX20. WARNING: Someof these codes may cause blockage or malfunction of the cell, therefore, it isunderstood that you use them at your own risk.

This means your SGH-F500 Samsung mobile has encounter a software error. To retify this, flashing your phone in a phone clinic close to you as that is the only remedy for you to enjoy your phone back. Meanwhile, one or more application that you installed on your phone is responsible for your cellular not booting properly.
Best regards.

yr mobile has a serious problem even i had the same problem...dis is happening because of using corrupeted or unsportive files......so...take it to the servicng centre OR..reset yr phone..which is present in "settings"

go to cell phone settings and look for restore factory settings

i guess havin Virus... try good antivirus and then insert sim,,, also insert the same in in other cell to check sim is ok or not...

1. First do a CUSTOM reset: *2767*2878# (star 2767 star 2878 hash)
turn off the phone
2. take out the battery and sim and put wrong network SIM and insert a half of it,
so it won't ask for network password and shows "Insert SIM" message.
Now put the battery ,and switch the phone on .(phone shows "Insert SIM" message.)
3.With out turn off the phone push the sim fully in. At this stage the phone is still asking to "Insert SIM"
4. Make a FULL reset by typing: *2767*3855#(star 2767 star 3855 hash)
5. The phone should reboot working with "wrong" sim inside.
6. Make a Change the NCK password to 8 zeros by typing: *7465625*638*00000000*00000000#
(star 7465625 star 638 star 8zeros star 8zeros hash)
7. Now Disable network lock By typing: #7465625*638*00000000#
(hash 7465625 star 638 star 8zeros hash)
Phone is unlocked (check with *#7465625#)

Ok try a full reset *2767*3855# make sure your phone is fully charged and dont remove the bad while in process wait for it to come back on.