Copied from my post on the Motorola forums...
You won't be able to obtain a Verizon nano sim from a corporate store without the phone in question with you. Because it's a Nexus 6 and they aren't selling it, they won't provide you one still even when you bring in the phone. HOWEVER... I still found a way earlier today to get a fresh sim and AND get it activated. I shall explain below:
*
*
As stated before, you have a 99.99999% chance of being told "no" on a nano sim request from a corporate Verizon store. I am lucky enough to have a mix of corporate and "verified" Verizon retailers near my neighborhood that allowed me to test out some things. As mentioned earlier (again) by @pmhesse, I too was told no at multiple corporate stores and had to get a nano sim overnighted to me from Verizon customer service. Me being the impatient person I am, I couldn't live with having my phone for 2+ days with no real use outside of wifi, so I hit some "verified" shops to test my luck there. I call these shops verified because they're usually the smaller brick and mortar Verizon carriers that will (sometimes) sell other cell phone carrier's phones and service plans. Bottom line, if they're selling a Verizon phone and can offer you a contract, they will have the sim cards available to them (minus the limitations to distribute them like a corporate store would). This was all in theory until I proved it anyway. The first "verified" seller I went to was ready to give me a nano sim for a small price ($5) after I explained to them what was going on. Seeing as I knew a closer store to my home that was another 3 or 4 minutes up the road, I declined the offer and went there instead. After giving them the same story of trying to obtain just a sim to use in my new phone I was "planning to receive," the second store provided me a sim free of charge (after looking up to see if they were supposed to charge for it, first, which no one providing a Verizon sim should...technically).I told both stores I was "planning to receive" the phone because they, just as the corporate store said earlier, needed the phone to match the IMEI number to the sim for activation. There was no point in me bringing them my phone when I already knew what the outcome of trying to activate it on my Nexus would bring about.
*
So, that was just OBTAINING the sim card. I still had to call customer service and jump through hoops to get the sim activated for my current line on Verizon which I will explain next:
*
*
Let me start off by saying that most Verizon CS reps are devoid of any knowledge of the Nexus 6 or how exactly to get the phone working on their network. The first rep I talked to asked for my Nexus IMEI number, saw that it was an unknown device, and quickly shut me down on my quest to get the sim to work. I would not be denied, and after telling her again and again that I needed just the sim activated, she decided to transfer me to a "Motorola phone rep." Long story short, I ended up on the phone with some Greyhound bus station after trying to navigate through some unknown automated menu she transferred me over to. I can't tell you how pissed I was, and upon calling back to CS, I was ready to Release the Kraken! The gods had shown favor to me for this next call, as I was connected to a young man that not only knew what the Nexus 6 was, but was currently using the Nexus 5 and trying to decide to upgrade to the 6 or Moto X 2. He had not done an activation of the Nexus 6 on Verizon, and after geek talk about having the phone and it's capabilities, went to work to try and get my new sim working. He ran into the same problem as the CS before, saying that the device showed up as an unknown in their system and that he would not be able to link the sim to the phone on their network. The numbers (MEID, ICCID) he took down from me for reference after inserting the nonworking sim were under Settings >>> About phone >>> Status. He, however, gave me an ultimatum that he would try that he said could work completely or partially; either the sim would only be 4G capable (data only) and I'd have to get another service to provide me cell service (as Verizon's call/text goes over 3G/1X connections), or we'd somehow get the sim to work. Maybe he was really trying to give me all avenues to get the phone working or just helping himself in his decision to decide on a phone, but I told him I had nothing to lose by trying whatever workaround(s) he could think of. Pretty much he activated the sim as if it were being used on my current Note 3 phone, and after whatever flip he switched or enabling he started, my Nexus phone (sim inserted already) flashed a LTE symbol on the connection bars. He then asked me to reboot the phone, which I did, and see if I could get some kind of data connection going. MIND YOU, I'm currently on the phone with him via my VZW Note 3 that I'm trying to switch the service from, so I wasn't sure if he'd be cut off during this whole process or not, but he never was. After the reboot, he asked me to open a browser and try to surf the web. Nothing. So he suggested a second reboot and cited that it sometimes takes a few minutes and few reboots for the network to pick up a newly activated sim the first time. Upon the second reboot, I saw 3G pop on the phone (informed him of that) and then switch over to LTE. It was at this time he told me to go to my "Cellular network" settings (Settings >>> More >>> Cellular networks) and switch it from Global (mine was set to it at least) to LTE. BAM, everything was a go then. He said that I probably wouldn't have call/text, but then I got a text from a friend. He tested it out by sending me a test text from VZW and I received it. He told me to try a call, but we figured that probably wasn't going to work since I was currently using the number to talk to him via my Note 3. After thanking him for the help, I got off the phone with him, put my Note 3 on Airplane mode, and my phone has been working flawlessly since.
Posted via my Moto Nexus 6 on VZW