Message sending failed in sony ericsson - Sony Ericsson W700i Cellular Phone

SOURCE: k850i - operation failed for sms inbox and drafts etc

I have the same problem with the sms thing, what i did is master reset and choose reset all (prepare back up first). Just wait few minutes and for me it worked. But do me a favor, just email sonny ericsson and tell about this problem so they will start doing something about it.

SOURCE: sony ericsson w910i :problem with send/receive sms

you don't have to do the complete master reset..this happened to me yesterday and i did 'reset settings'. it works as well and you dont have to move any of your files. :)

SOURCE: Sony Ericsson T303

As regards the ringtones, have you just put the volume down, as I did this unintentionally and couldn't hear the ringtones until my son turned the volume back up for me - by pressing the up button while ringtone is playing.

SOURCE: Text message won't send.......Sony Ericsson Z750a

I had a similar problem when dealing with my own phone of the same type. The only permanent solution is to engage the master reset which you can find in the settings folder. A temporay solution is to go to your outbox, and you'll have a message that either has a little red x on it or just is a plain letter shape. if you try to delete this it will say one or more messages can't be deleted. make sure you change it's status to canceled, then select it choose send to drafts. make sure there are no messages in your outbox and only the one message you just moved to drafts in that folder. it still will npot allow you to delete the message. remove your battery while the phone is still on. replace reboot go to drafts and you should be able to then delete the message from drafts. if you still can't the only option i see, which is what i did, is to use the master reset

SOURCE: Sending failed Message barred problem - sony ericsson k608i

just reload your phone