Well I tried the fix and it seemed to help a great deal, but selecting 13K QCELP and not the Wildcard worked best for me. Since I'm not sure I'm permitted to post links to other sites, let me simply say that if you search for "Verizon 13K QCELP", there are sites that explain why this mode typically offers better voice quality and why Verizon and others have elected not to use it. The problem really must lie, however, with LG's Qualcomm modem because my wife's Moto X sounds great using 8K EVRC and still has better phone quality than my LG G2 even with 13K QCELP. I think my phone will at least be usable as a phone now and for that I'm very grateful.