For those that want the details - here is an excerpt from SD
4ever Method
The 4ever method is nothing more than the old upgrade transfer method except with a TDP line rather than a basic line. The 4ever Method is the preferred method if you have a TDP line to transfer an upgrade to as you will not be left with a pending activation or pending equipment order on your line. You must first activate the new phone on the TDP line in order to clear the PA/PEO from the TDP line. Then you put the TDP line's old phone back on the TDP line and the new phone on the UDP line.
When you do the 4ever Method, it is the UDP line's upgrade that is used and it is the UDP line's contract that is extended, not the TDP line's. The TDP line's contract end date and upgrade date do not change when you do the 4ever Method.
You can do the 4ever Method if you have a line situation like this (you can have additional lines too):
L1: UDP 3G or 4G LTE phone Yes
L2: TDP 3G or 4G LTE phone No
1) Log onto Verizon or Best Buy and transfer your UDP line's upgrade to a TDP line that is not currently eligible for its own upgrade;
2) Order the new smartphone you want on the TDP line selecting the TDP line's same data plan if required to select a data plan;
3) When the new smartphone arrives, activate it on the TDP line according to the directions that came with the phone using the SIM card that ships with the phone;
4) Wait at least an hour and make a few calls/text from the new smartphone to make sure it activated OK;
5) If the new smartphone and the TDP line's old phone have the same size SIM card, swap SIMs to put the TDP line's old phone back on the TDP line; if not, log onto Verizon to put the TDP line's old smartphone back on the TDP line; and
6) Depending on SIM card size, log onto Verizon and put the new smartphone on the UDP line or swap SIMs with the UDP line's old phone to put the new smartphone on the UDP line.
The 4ever Method works in-store anywhere upgrades can be transferred also, but it is NOT RECOMMENDED to do this in-store at a Verizon corporate store as Verizon reps can manually switch you off of UDP if they make a mistake or if they are just mean and feel like doing it to you. 4ever Method works in-store at Best Buy, Costco and Staples but the reps may tell you that you will lose your UDP but you won't if the rep does it properly. There are likely other stores that can do upgrade transfers, however Apple stores cannot do upgrade transfers.
If you do an upgrade transfer in-store and a rep tells you they have to switch you off of UDP, that is FALSE. It is best at that point to leave the store and do not allow them to switch you off of UDP. You have to control the reps and make sure they do the upgrade transfer properly and do not mess with your UDP if you are going to try to do an upgrade transfer in-store. Costco in-store reps in some locations will try to convince you that they have to switch you to the Data Max plan if you do 4ever because the system will automatically switch you to the 2GB plan - THIS IS FALSE. Leave the store if you encounter a rep like that.
If you do the 4ever Method in-store anywhere, be sure the rep understands you want to do an UPGRADE TRANSFER. Make sure they do NOT upgrade on the UDP line. Some reps may think you want to upgrade on the UDP line and then switch phones, which is not what you want to do and which will cost you your UDP. If you do an upgrade transfer in-store and a rep tells you they have to switch you off of UDP, that is FALSE. Walk away from the rep and do not allow them to switch you off of UDP. You have to control the reps and make sure they do the upgrade transfer and do not mess with your UDP if you are going to try to do an upgrade transfer in-store. Costco in-store reps in some locations will try to convince you that they have to switch you to the Data Max plan if you do 4ever because the system will automatically switch you to the 2GB plan - THIS IS FALSE. Leave the store if you encounter a rep like that.
It is best not to discuss switching phones b/t lines with an in-store rep. You do the phone switching yourself when you get home. Make sure the in-store rep fully understands that you want your UDP line's UPGRADE TRANSFERRED to the TDP line and that the purchase/activation of the new smartphone is to be done on the TDP line.
Then when you get home, you switch your phones around between lines yourself. It is best not to ask an in-store rep to switch phones for you because you may confuse them and they may try to upgrade on the UDP line.
4ever Method In-store
1) Go to a 3rd party retailer store where they can do upgrade transfers;
2) Have the rep transfer your UDP line's upgrade to a TDP line that is not currently eligible for its own upgrade - do not mention switching phones around between lines to the rep;
3) Have the rep purchase and activate the new smartphone on the TDP line;
4) Pay and leave the store;
5) When you get home from the store, wait at least an hour and make a few calls/text from the new smartphone to make sure it activated OK on the TDP line;
6) Log onto Verizon and put the TDP line's old phone back on the TDP line; and
7) Log onto Verizon and put the new smartphone on the UDP line.