I cannot receive MMS over WiFi- anyone else struggling? (2nd post)

Question

Original post:
     I cannot receive MMS over WiFi- anyone else struggling?
Apparently, it's not the settings. Tech told me I need to just return the phone b/c they don't have a clue what's wrong with it. They've done everything they can on their end and nothing works. I posted about this earlier just before I spoke to advanced tech support and thought they'd fixed the issue, but it's not fixed.
If someone finds a fix for this, please post it. As of now, my plan is to return the phone to the store tomorrow.

Answer 1

schaweet
UPDATE- A tech-savvy friend took a look at my phone this evening at work and couldn't fix the problem. He's a former tech support employee for another major wireless provider. He said his best guess is the problem is somewhere in the APN settings. It seems like LG's default settings are fighting (for lack of a better word) with Verizon's settings. He couldn't fix the problem and ended up suggesting I download the texting app "Textra" because it's one where the settings allow you to change the APN.
I was dubious because we've already tried changing the texting program to the two others that come on the phone and neither worked. But neither allow you to edit or add to the APN settings either.
I'm not sure how it is on anyone else's LG G3, but mine doesn't allow you to change the APN settings at all. On every single walk-through I've found for setting up MMS, I've followed it to the letter right up until it says, "Click the 'add' button in the upper right corner..." because that isn't an option on my phone. I imagine it's prob the same way for many others as well. I don't know if it's just on Verizon or if it's a product-wide problem.
My tech friend said the only way I can change the APN settings on my own (without speaking to Verizon's tech folks again) would be to "jail break" the phone first, which I really don't want to do.
I downloaded Textra and was surprised to find that it comes with a check-box for "MMS WiFi fix" under the setting "go here if MMS isn't working."  I clicked the appropriate boxes and sent myself a MMS using my husband's phone. I also asked a friend who has another provider to text me a test pic. Textra turned off WiFi, downloaded both pix, and then turned WiFi back on... exactly the way the phone's default settings should behave. It took a minute or so longer than a typical text but I'm okay with that so long as pix come through.
I've been fighting this issue for nearly 2 weeks now. I've spoken to 7 different people at Verizon as well as several friends who are extremely knowledgeable regarding cell phone OS (KitKat in particular), and this is the only thing that has actually worked. I'm going to give it 24 hours though before I say the problem is truly "fixed."
Hope this works!! (crosses fingers)
mms_problem lg_g3 mms not receiving mms while connected to wifi