Hi, I had removed my sim card on my Mobicel Trendy phone and inserted another one and now its asking for privacy protection password which I dont know. What should I do?

SOURCE: keep saying insert SIM card

You are trying to use a SIM from another Network or Handset but your phone is LOCKED to your old network and/or to a specific SIM card and number: this is why it is asking you for the unlock code to remove the restriction. It you are no longer under contract or obligations (such as minimum total recharge amounts for apre-paid handsets), then you could try to request the unlock code from the original service provider of your handset.
As for asking to insert SIM card, make sure that the SIM is correctly and securely inserted in your handset SIM holder. Also check that the SIM is still functional by inserting it in another handset: SIM card can be permanently and physically disabled if you attempt to enter too many consecutive invalid codes (usually around 10).
Hope it helps and good luck!

SOURCE: memory card asks password ...but i've forgot my password

THIS WILL MAKE YOU LOOSE ALL FILES!!!
(even password)
Take the memorycard out of the phone and,
put it in a computer.Use filesystem FAT-32
to reformat your memorycard.
Now the card will work again!
No password, No files will be left after a
complete reformat
This is your solution! Please vote!

SOURCE: hi..my Samsung Star GT-S5233 Cell Phone sim has

It may be due to network lock,
you can unlock it and switch over to another network , you can get unlock codes here http://www.theunlockarena.com/samsung-s5233a/rs13wp9/

you need to specify the country and network provider

SOURCE: ive got a d2712 mobicel

ive got a mobicel d2710 and when i forgot my unlock code for the settings menu.pls help

SOURCE: whenever i insert sim card, simlock and enter passsword display,and i dont know the password, can you help me?

try to type 0000