Page Plus Cellular it might be a good idea to do it ASAP or not at all. According to the latest in a long string of rumors, Verizon will block Page Plus from activating anything except Verizon and Page Plus branded phones sometime around August 1st.
The Aug 1 date comes from Page Plus dealer Kitty Wireless whose owner posted on Kitty Forums yesterday;
"We have additional confirmation today that this will very likely go into effect on Page Plus around 8/1. I'm starting to give this more credibility, since it's now confirmed from a second source close to the center of the issue."
The August 1 date seems believable given another Verizon MVNO, Selectel Wireless which lost its ability to activate non-Verizon phones on July 23, told it's dealers that the same thing could happen to Page Plus as soon as July 31.
Earlier versions of the rumor had the ban on non-Verizon phones not occurring until Page Plus got access to the LTE network. Losing the ability to activate "foreign" devices seems like a fair trade off for getting LTE. But with LTE believed to be at least a month away for Page Plus, the loss of the ability to use flashed Sprint, etc phones is likely to put a crimp in Page Plus activations for a month or two.
To make matters worse, Kitty says that many current Page Plus branded phones are appearing as "unknown" devices in the Page Plus system. That's the same status that's reported for flashed Sprint etc., phones. Unless Verizon's fixes that glitch if could render unsold phones in Page Plus and dealer's inventories worthless.
Update: 7/30/14: Kitty has posted that the non-Verizon device ban on PagePlus "may" have been postponed until 12/31/14.
Update: 8/1/14: It's the end of the day on Aug 1 and PagePlus is still activating non-Verizon phones. It looks like this rumor was just another rumor.
Related:Selectel Wireless Is No Longer Able to Activate Non-Verizon Phones
PagePlus Rumored To Be Getting LTE, Possibly as Soon as Next Month
Developing: Verizon May Block MVNOs From Activating Non-Verizon Phones