Hello Thatyug,
Welcome to the community!
If you purchased the phone on newegg.ca, it's likely the not the TD-LTE version. Judging by the specifications listed on the LG website here, the phone should have 3 of the compatible bands (4, 12 and 17). The phone should also have all of the compatible bands/frequencies fore 2G and '3G'. **edit** You can verify the compatible bands/frequencies here.**
Since the phone is LTE-capable, it should be using the single ltemobile.apn. You can verify the correct settings here.
Judging by your available network settings, I believe the correct setting should be Global.
**edit** After re-reading your post, you note that you used to get signal drops with your old phone as well? Coverage depends on your location relative to the cellular towers. If a device does not have all of the compatible bands/frequencies, coverage would also depend on the bands/frequencies of those surrounding towers. You can get an idea of where the cellular towers are here. Even if there are cellular towers in the vincinity, cell signal could get blocked by obstructions such as buildings between your location and the towers.**
Hope this helps 
Cheers
Hello again,
Hmm, that's strange...
Are you able to try your SIM in a different phone again? They can sometimes get damaged. Alternatively, you might also consider trying a different SIM in your phone. If you don't know anyone else with Fido, you could visit a Fido location and ask if you could test one of their SIMs.
To clarify, did you restart your phone after changing the APN settings? Additionally, have you tried ltemobile.apn as all small letters? I know some phones have been tempermental that way.
I mentioned above that I thought the correct network setting was Global. However, you might consider trying the other settings as well. That said, the other settings seem like they would have limitations:
LTE/CDMA - would only allow LTE since Fido/Rogers does not operate CDMA
GSM/UMTS - would only allow 2G and/or '3G'
You might consider trying the LG android codes to access the network settings via the service menu. Occasionally, they have additional options available.
Additionally, to be clear, you were able to get adequate signal with your old phone on Rogers at your current location?
Just a quick note regarding roaming... Assuming that plan is eligible for Extended coverage, roaming on the other networks as Fido-EXT will not incur additional charges. However, travelling outside of Canada (and outside areas of extended coverage) will incur roaming fees (unless you purchase travel pack or Fido Roam).
**edit** When you try those network setting changes, what (if any) networks show as available when you search networks manually?**
Hope this helps
Cheers
Hello again,
Something else that came to mind if the above doesn't seem to fix your issue. Have you enabled roaming data? The phone was made for US Cellular and I believe they are CDMA-based. It's possible that they require roaming data enabled to work properly on other networks.
Also, just to be certain, is the phone unlocked?
Hope this helps
Cheers
