I recently purchased two Xbee Cell CAT 1 Modems (Verizon). One was part of the development kit and one a stand alone module. Both were working well with SMS for a couple of weeks and then suddenly (June 24th) neither could send or receive SMS. Digi provided the Verizon Sims for both. Both units are continuing to function well with tcp communication to a data logging website using the Micropython on the modules. Has anyone else seen this problem recently?