I had the expired message problem too.. rebooting let me download the MMS though. I had much more severe problems back when the Intercept first came out so this doesn't bother me too much since it does work.
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Castrol EDGE 5W-30 is my drug of choice.
Primary: iPhone 6 64GB, Galaxy Note 3, Galaxy Avant: 5 lines, 3x $5 Android web, 1x $2.99 T-Zones
Secondary: iPhone 5 & Motorola E LTE: TracFone (Verizon)
Mobile Broadband: ZTE Z915 LTE hotspot (5GB for $10) + iPad Mini Retina w/ T-Mobile LTE