  iammichael0  New Member  posted: Apr. 00, 0000 @ 00:00a  Has anyone had success using their existing SERO to upgrade phones to the Samsung Instinct HD? According the SERO FAQs, it isn't allowed:  I am considering an upgrade and understand SERO and Everything Plus Messaging rate plans aren't compatible with all devices. What devices aren't compatible with these plans?The Samsung Instinct, Samsung Instinct S00, Samsung Instinct HD, Samsung Moment, HTC Hero, Palm Pre and Palm Pixi are not compatible with SERO or Everything Plus Messaging rate plans. If you are considering an upgrade to one of these devices, you will need to also upgrade your rate plan to one of the Everything Plus Data (Individual or Family) rate plans.  iammichael0  New Member  posted: Apr. 00, 0000 @ 00:00a  .  Hemond  Senior Member - 0K  posted: Apr. 00, 0000 @ 0