Why wont my 16 gb sandisk micro sd card work in my LG 800G cell phone?

SOURCE: Micro-sd card capacity

absolutely. the first time you pop it in, your phone will ask you if you want to format it. select 'yes' and then you will find several new folders for pix, flix, music, etc.

SOURCE: micro SD card wont work

type 277634# * # (no spaces)
click port setting
click mass storage
click mass storage remove
go back to main screen and check again for memory
if this doesnt work,take out memory card and try without the memory card.

SOURCE: What size micro sd for my Samsung Sync cell phone

anything over 2gb is a micro sdhc the hc means high capacity so for most phones 2gb is the most you can go thats why the 1gb works and not the 4.

SOURCE: My LG Chocolate VX8550 wont recognize micro sd card

Here are the steps I took:

1. Insert the micro sd card with the metal plates facing you (that took me a second). Don't worry about the little push you have to give.
2. Go to the Settings & Tools option in the Menu.
3. Select *. Memory
4. Selct 3. Card Memory
5. Select Options while the bar is on "1. Memory Usage". The only option available to me was 1. Format and select that.
6. It will ask for the phone lock code-if you have never set it IT IS THE LAST 4 DIGITS OF YOUR TELEPHONE NUMBER.
7. The phone will format the card and put the file folders on it.
8. Use the adaptor USB reader or whatever you have to connect it to the computer. Copy songs to the my_music folder.

1. You should select the part of the song you like, and can add effects with this:http://www.mptrim.com/
2. To set it as a ringtone, send it as an attachments to you [email protected]. It must be small to go through, around 30 seconds.
   
3. You will get a text message, and select options. Select Save As Ringtone.

SOURCE: 8gb micro sd card does not work. lg vu cu920. is there a fix

I HAD THE SAME PROBLEM AND KEPT ON MESSING WITH THE 4G MEMORY CARD AND FOUND OUT THAT I HAD TO FORMAT THE MEMORY CARD ON MY COMPUTER AND NOW IT READS THE CARD..ON THE SIDE OF THE SD ADAPTER HAS A SLIDING PIECE THAT SAVES YOU FROM DELETING THINGS ACCIDENTALLY BUT IF YOU SLIDE IT INTO THE MIDDLE POSITION THEN IT WILL ALLOW YOU TO FORMAT THE MEMORY CARD BUT YOU WILL LOSE WHATEVER THAT IS ON THE MEMORY CARD AND WILL HAVE TO DOWNLOAD IT ALL OVER AGAIN..I HOPE THIS IS CLEAR ENOUGH FOR EVERYBODY TO UNDERSTAND BUT THIS IS HOW I GOT MY MUSIC AND PICS ON THE MEMORY CARD