Swap number by porting out and then back to Verizon

Question

I currently have 4 lines with Verizon on a Family Shared Plan. Line A has a basic phone and is my primary number where I got all the calls, line B and C belong to my family members, and line D is a new line I took over recently under assumption of liability because it has unlimited data feature.
Now, what I really want is to swap my primary number from Line A to Lind D, so that I can use my primary number with the line that has unlimited data. I don’t care if I lose the current number on Line D. However, according to multiple verizon reps, you can not swap phone numbers freely.
It seems that the only way to accomplish this is to first set up Line D as the primary line, then port out Line A to another carriier (for example Page Plus), then port it back in to overwrite the number on Line D. Can someone from Verizon confirm if this is the only way to get my primary number on Line D with the unlimited data? Does it even work? Any restrictions for porting back a number that used to be with Verizon?
By the way Line A is month to month now so I am not worried about ETF.
Any help will be appreciated.

Answer 1

jimfitzgerald wrote:
Dion, that doesn't solve his problem. He wants to keep the number that is currently on line A and move THAT number to his smartphone with unlimited data. That's the same situation I am in. I think the only way to do it is wait until the contract expires and then move the number to the desired phone. That's what I am going to do in January.
I appreciate Dion to take time and reply my post, but unfortunately he provided incorrect information. I have just done it and got what I wanted. Obviously, you CAN port your line to another company (say Pageplus) for free, thus canceling the line with Verizon. Then wait until the next billing cycle, and port that number back in to replace existing Verizon number, all for free. No change is made to the account calling plans, features, contract, etc, since it's a simple phone number change. 
It took me 10 mins on the phone with Pageplus CS to port the number from Verizon to Pageplus, 3 days before the end of my billing cycle. Then I waited for 5 days, just to be sure that Verizon had release the number, and called Verizon to request the port in. The porting request was done in 5 mins with automated system, and the port went thru almost instantly. I reprogrammed the phone by dialing *228 and everything works fine. I logged on my Verizon immediately and my number has already been updated. Now I finally have my main number on the line with unlimited data.
The only thing to note is that when you change your phone number, your bill/usage will be prorated if it's your primary line.