Okay, My apologies first off. The antenna connector that I meant to say was MHF...I got that wrong

I have included a picture of the connectors that I'm speaking in regards to. Almost ALL (hint word almost) wifi enabled mobile devices use these, but some (my huawei ascend for instance) have a built in "flat" antenna that is directly soldered onto the board. However, the huawei ascend that is in the picture next to my LG connect (the phone on the left) DOES have the connection that I'm speaking of.
The connect has two of them, and the huawei ascend has one - even though I know for a fact that one isn't for the wifi.
This is why I say that it'll take investigative work to find it, or find out where it may be.
There may be a small black (literally almost not noticeable) sticker covering it (black, grey, white - whatever color the phone is.
Anyways, here's a picture of my lg connect, and huawei ascend side by side with their combined three connectors showing.
I've also included links to both an MHF (also known as U.FL) to SMA connector pigtail (converts that mini connection into a "desktop" type for regular antennas) and also a "cantenna" (original manufacturer/developer of the technology) wireless directional hi-gain antenna.
To use these in conjunction you just pop the mhf connector onto your phone, then screw the cantenna's connector onto the pigtail's SMA end (the WAY bigger one) then you're done...start twisting, and turning your cantenna into a hi-gain wifi finding beast.
Pics:
Phones, and connector showing
Pigtail Converter:
2 Mini PCI U.FL to RP-SMA WiFi Antenna Pigtail Adapter | eBay
Cantenna Hi-Gain Directional YAGI Antenna:
14dBi One Super CANTENNA YAGI WiFi Extender 802.11bg | eBay
OR...
A small wifi antenna (standard strength 2DBi commonly used in mini atx towers like the HP P6010):
1pcs Laptop Notebook PC Desktop Network-Card Wi-Fi W-LAN U.FL MiNi PCI-E Antenna | eBay
You will either use the pigtail converter with the hi-gain antenna, or other types of antennae with SMA Adapters, or you can simply use one of the "mini pci" wifi antennae (they will all be that connector type if they're for mini pci cards as the entire network card's about two inches wide

)
Hopefully this'll help you find what you're looking for a little easier now. Sorry for the confusion.
Oh, and FWIW...Never trust anyone that works for your mobile provider, or manufacturer. LG and Sprint BOTH told me that the LG Rumor 2 wasn't capable of Phone as Modem because it "didn't have the hardware necessary for it, nor the software capability in the networking protocol." and yet I still managed to not only figure out that it did, but get it working, and write the ONLY guide IN THE WORLD (The webpage it's hosted on is worth an estimated ~4 Thousand dollars for a single webpage

) explaining how to do it - AND do it off of sprints networks. (they changed their PAM and DUN policy because of me

Tethering is no longer an option on anything except 3g, and 4g

)
Good luck, and if you have more questions, feel free to let me know.