Why do you think you'll lose that plan? You aren't changing anything with your plan, just upgrading your device. They don't force you to change anything when you order online or on the phone from what I just did or have experienced with them the last time I ordered from them.
---------- Post added at 09:47 PM ---------- Previous post was at 09:45 PM ----------
No, it's for upgrades as well... it says pretty plainly on the page "Select your upgrade type" and then lists the Individual/Family Main/Family Other lines options. I just did it and it requires you to put the number that the device is going to be activated on in as part of the verification process.
ETA: SOOOOOO.... I don't think its going to be a big deal but I just noticed, after being completely baffled as to why they had my city/state/zip prepopulated with the wrong information, what could be an issue. The link to the $119 seems to be a "regional" deal for "Spring, TX 77379" area. After I finished my order, I went back and noticed that info at the top of the page, changed the zip to my correct zip and it says the $119 is not offered in my area. Now, why exactly an online vendor has regional sales BUT that appears to be the case. Hoping that tomorrow once the Sprint approval goes through, I can just call or email and get my address updated and all will be fine.
WORST CASE: I get the phone for $149 (still saving $78)
BEST CASE: I get the phone for $119 (saving $108)
EITHER WAY: I'm eatin cake