My phone randomly starts saying that insert sim while my sim chip is already in there. i went to at@t and got a new sim chip... still malfunctions. at first it was really easy to avoid i just turned my phone off and back on, but now it will be there for hours at a time, also it will say unregistered battery and wont charge... any help would be great thanks

turn off phone.

remove sim card and wipe the chip, better with an rubber eraser.

re-insert sim card and restart phone

good luck

try taking SIM and battery out placing it back in an powering on.

If you try this and it still does not work you may need a new SIM card. Take it to a local dealer they should have a new SIM they will put your number on it and you will be back in business.

If the new SIM doesn't not work you will now know it is your Phone, which means time for a new one.

good luck

THIS SIDE HELP YOU

http://www.foneszone.co.uk/forms/unlock_form.php
AFTER TRY THIS
http://www.blurtit.com/q2229096.html

Insert SIM card means that the SIM is not seated correctly. It may not be locked into place and got jostled around when you plugged the phone into power. This message would not relate to a battery going dead, only to the device not recognizing the SIM card and that would only be if the SIM was not activated (which you know that it is active) or if it is not properly seated (locked down, etc.). Make sure that the SIM is properly seated (look at the manual to be sure) and then you should be okay. If this is not the case, and the SIM is properly seated, then the device is defective, broken or the unlocking caused faulty errors.

put the smart chip in the other way

smart chip means the SIM card.

try cleaning the metallic part of the SIM card with a cloth and the metal connectors on the phone with cotton bud etc.

Put it back and try again.

If not working grab another SIM card (working - friend's etc) to test.

If still not working, send to service centre.
If working for other SIM card then replace your own SIM card.

i am using w580i sony ericsson mobile phone which freeze and restrat after some seconds and says insert sim when sim is already inserted

attempt to take the SIM card out and gently wipe it off (pay especial detail to the copper connectors on the under-side.) after that, give a gentle blow to the recieving area for the sim on the phone and place the sim back in the phone, power up, and hopefully this problem will be solved. this issue occurs often to myself and this seems to be a very simple solution.

Sounds like phone is locked or firmware is bad

yeah you probably need a new chip due to the 3g network it might work on the other phones because they are older