Sending messages when I go into msg settings it says sim card busy. cannot send any msg's have tried everything!

Remove your SIM card and try it on other hand-set or mobile and see whether it happen again or not?
If it work on other hand-set or mobile then reset (restore factories) from your hand-set.
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lock symbol in ms g is the security.That are protected msgs.
and business card can be through mms,i think u dont hv mms setting,so it displayed SERVICE DENIED

Use another sim and try sending messages. If it works, its a sim card problem.
If it still doesnt work, do a factory reset.

First backup your data, remove your memory card and type *#7370#.

Now it should work.

Cheers

the message center number must have been tampered with.call your service provider customer care line for this number.then go to message>message setting>text messages>message center now click to enter the given numbers

ITS UR SIM PROUBLEM
SO GO TO SERVICE PROVIDER SHOP{SYORE}
AND CHANGE UR SIM
IDRISH 911

nice noon...you need go to cellphone repair shop anf try to reprogram or master reset your phone,,i think the problem of your phone is software..good luck....

just check three settings in text msg settings
1. msg center number
2.reply via same center option should be no
3. msg type should be text

try formatting your phone enter this code *#7780# then after that try sending msg again hope this will help you

SMS and picture messages are not stored on the memory stick.
Sony Ericsson phones have a set allotted memory space for messages and other phone functions.
You may need to delete picture messages, check if you have any saved messages (these are saved to your SIM).
Generally, the only other option would be to reset your phone.
To do a master reset, go to your Menu, then select Settings. Under the General tab, scroll down to Master reset and press select. Select Reset All and press yes.
If prompted, the default passcode is 0000.
Please note that a Master Reset will return the phone to its factory default settings (including locking a phone to the carrier if it has been unlocked). All user data and settings will be deleted. If you have any files or information you would like to save, you should either back it up to a memory stick or your computer. Your contacts can be backed up to the memory stick or your SIM card.

Hi,
Check with diffrent SIM Probaly SIM CARD is Bad.