Ascom recently released latest update to their Tems pocket application
Now supporting also Lollipop 5.0
Also on Samsung Galaxy S4 GT-I9506
Issue with touch responsiveness and S-Pen support.
TEMS Pocket failed to shut down when in agent or controller mode.
Control function GUI indication was faulty on Sharp 304SH and Samsung Galaxy Note 4 SM-N910G, SM-N910F, and SM-N910T.
Version released is 15.12 and according to Ascom in order to upgrade your handsets from Tems pocket 14.x
you need to contact Ascom technical support. This is because of changes made to the GLS licensing framework for TEMS Pocket in connection with the 15.0 release.
Note also that an upgrade to the latest phone firmware is required to gain access to stability fixes made for the Sony Xperia LT30a phone.