I'm new here and I got a quick question. I got boost mobile and I logged into my account and see that I qualify for a discounted upgrade. The phone I got still works but there are offering me an upgrade for around $12 shipped. My question is if I order the phone can I continue to use my old phone until I activate the new phone and keep the new phone to use off my home WiFi or do I have to activate and use my new phone right away. The new phone that I plan to get is a TCL 30 XE andrioid. Thanks in advance for any help you can provide.