Interesting.
I'm currently on a legacy nationwide 700 plan, with three active UDP lines. I originally moved to Verizon to get my wife an iPhone4 on launch day, and I subsequently purchased a Tbolt on launch day. However, I was not able to go through one normal upgrade without Verizon getting draconian about UDP, and have had to jump through every upgrade loophole to upgrade our phones. So between the last accessible loophole being closed and the degradation in coverage and bandwidth since the rollout of XLTE, here in Southern California, not to mention the high monthly bill even with some discounts, I am begrudgingly moving to t-mobile, to take advantage of their ETF payoff, easy upgrade program, lower monthly bill with govt discount, and the rollout of their 700mhz bandwidth will give them a dual band lte presence like big red and big orange.
I was just curious about the possibility of keeping one UDP line cheaply for home mifi use.
I've been grateful to everyone in this forum for all the information in regards to the upgrade loopholes. Having a note 3 with UDP is awesome.
Based on your plan, it sounds like you are eligible to get an unlimited iPhone plan from Apple.com. This could solve a lot of your problems, by doing the following:
1.) Purchase an on-contract iPhone from apple.com (an iPhone 5c would be zero down with a two year-contract from Verizon)
2.) Under Existing Customer select "add a new line"
3.) Provide your main wireless number, zip code, and last 4 of your social security number
4.) Now select your current plan by selecting the dial above your shared minutes and hitting continue
This should bring you to the "choose data" section. Select the blue arrow to the right of the 10 GB plan. The last plan should say "Unlimited iPhone". This plan will give you an unlimited data on the new line (this line will be the UDP to use for the MiFi device). Once you activate the new phone, you'll just need to call Verizon and ask them to move the new line into an individual/sub account separate from your main account. Additionally, have them change the new line to the 30 minute, pay each text, unlimited data for $45 a month. Make sure to keep the new iPhone active when calling Verizon.
By doing this, you are now all set up to move to T-Mobile with your other three lines. You'll maintain an unlimited data plan for $45 (before taxes) whose SIM card can now be moved to a MiFi device.