Was told to get a new SIM card, I did, but still same issues. Today I was down the street and the iPhone 5 was able to receive an LTE signal and my GNex could not even receive 3G signal!
My phone was from one of the initial batches made in Korea since I bought it very soon after the release date. I am wondering if there was a bad batch of phones early on?
I have one of the initial launch phones as well. I also have one of my friends that still use the Gnex that was purchased 6 months later then me, and a few that used to have them and have since upgraded. Reading through your comments i see you have answered the question, but still question your phones hardware.
Like DM and others have said, This phone has terrible radios. Its a hardware issue that has no fix. I have tested the phone throughly over time with different radio packages. All that has gotten a little better is handoffs. (The point where the phone switches its data source) From 3g to LTE, Wifi to 3g/4g data, ect.
Signal and performance has seen little improvement, The phone IS capable of insane speeds when everything comes together. Clear day, no obstructions, Pinned LTE in an area known for strong signals, time of day/night when traffic should be minimal. Ive reached 45 meg down/20 up locally and 49 down/25 up while traveling.
I still have issues when inside structures, Ill find myself with out a signal when people around me on newer android phones/iphones have 2-3 bars. Or without LTE when others have it and are pinned out. (No idea why this happens, but im usually inside somewhere.)
I too have a network extender at home. Generally i have a pinned signal when within 10 feet of the extender, but anywhere else in the house my bars drop to 1-2. My girlfriends iphone keeps a pinned signal until were in the driveway, then she sees a drop and finally a switch over. If i am on the other side of the house from the extender, on a call and the outside signal seems like a better idea to the phone, it will try to switch and drop my call in the process. Then ill see the signal "reset" and pick back up on the network extender.
The radios themselves are terrible. You just have to live with it because at this point, because its not being fixed. It upsets me all the time as well, ill be in he middle of a good signal area and the phone will just loose all signal, Poof! Gone. Then a minute later it will come back. No reason, just happens. Its not your phone specifically, every gnex experiences this in one way or another. If you are fortunate enough to rarely travel and are always in an area with a strong signal you may never see this issue. But people that live in or travel to weak signal areas are gonna notice.
Till this day i have no real other complaints about the phone. I can deal with only a dual core processor, I can live with the camera being less then optimal, The screen has started to degrade, but its nothing i didnt expect to happen at some point. But these radios are the worst and really tick me off, a year ago i had hope that they would be fixed with a new radio update, but 3-4 packages later i am still left with a subpar phone. It is what it is, newer phones with newer radios don't experience these problems much or at all. But were unfortunately stuck with it until we upgrade.
Sorry for the rant/long post, but hopefully some of this helps.