Must be Able to be Activated on Ting - Verizon is an MVNO for Verizon.
      How to Check
            Go To: --> "Check your phone",   and enter your phone's IMEI

How to Find Your Phone's IMEI
      see: Swappa FAQ
      or:   dial "*#06#" on the phone

Must have an Unlocked Bootloader

      How to Check for an Unlocked Bootloader
            Turn on Developer Mode
                  Settings -> [System] -->About phone --> tap on "Build number" 7 times
            How to tell if you are already a Developer
                  a message will tell you on the first tap
            How to tell if your Bootloader is unlocked
                  Settings --> [System] --> [Advanced] --> Developer options --> OEM unlocking,
                      and slide the button to the right

      If "OEM unlocking" is absent or grayed out you do NOT have an unlocked bootloader.

      [extra step] - some versions of Android have extra steps

Please tell me your Phone's Codename
        Every cellphone model and variant has a unique codename.
      I am particularly interested in a:
            Pixel XL               codename 'marlin'
            Pixel XL2             codename 'taimen'
            LG G3                 codename 'd855'
            LG G5                 codename 'd850'
            Moto G7             codename 'river'
            Moto G7 Plus     codename 'lake'
            Samsung Galaxy S7             codename 'herolte'
            Samsung Galaxy S7 Edge    codename 'hero2lte'
            Samsung Galaxy S8             codename 'dreamlte'
            Samsung Galaxy S9             codename 'starlte'
            Samsung Galaxy S9+           codename 'star2lte'

How to Find the Codename
      On most Android phones.
      Power Off
      Press and hold the Volume Down button.
      Press and hold the Power On button
      The phone will boot to "Fastboot Mode", with the Android robot lying on its back.
      The line: "Product/Variant:   <codename>...", has the codename.

Msg to Sellers