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you can check it with other sim card ,if it remains the same problem ,it may be locked to particular network wont accept any sim card other than the particular network ,you can unlock it and used to other network,try here http://www.theunlockspot.com/lg-vu-cu920/rs10wp9/
The memory card might not have clicked into the slot , so remove and check the direction youhave inserted the micro sd card. Remove and push it to CLICK on to the latch , Now it mut be detected to open the files present.
Cut a small piece of cardboard or credit card plastic similar in shape to -- but just a bit smaller than -- the smart chip. Place the piece on top of the smart chip. Simultaneously slide both the smart chip and the piece of cardboard/plastic into the smart chip slot. Make certain you are inserting the smart chip with the proper end inserted first and with the contacts uncovered by the extra piece (On the LG Vu, the smart chip contacts will face down and the missing corner will be showing on the outside of the slot when the card is inserted properly.). If that doesn't do the trick -- see your cell phone provider and/or get a new phone.
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.
You have to insert the smart card all the way in on these phones. You can use a pen cap or something to push it all the way in there until it goes all the way in and click and stays there. Then it will not say " insert smart chip" anymore.