We have an LG-A380 flip phone from AT&T carrier. We had probs with the small memory built into the phone. But both AT&T tech and store guys didn't know what to do. One tech chat guy tried to scare me off: "Oh, you'll have to tear apart the phone and the memory is built in." He didn't know the phone supports an expansion MicroSD up to 32-GB. I bought the SanDisk Extreme 32GB today, and am so happy.
By the way, the LG-A380 does not show its slot. It is hidden under the battery cover. You have to remove the back battery cover, move the battery out, and then you can see the little 1/2 inch slot that takes the expansion card. This is hardly "tearing the phone apart." Nobody at AT&T told me this, I discovered it on my own.
I think they want to sell their more expensive plans and therefore push the use of iphones. One AT&T guy said, "We've changed the MyAT&T site several times, and so your phone can't access it because it can't handle too much data." Yes, of course, until I install my new MicroSDHD Extreme. Ha ha to you, AT&T!