RUT955 with a new design starts production this week.
In this code RUT955*03**0 - 03 stands for a new design and all standard order codes for RUT955 will be replaced in Teltonika web page by the end of this week.
Overall in the code RUT955T***** - T stands for the version of LTE module used. You can check for more available versions here
It really depends on where you are buying it from, resellers need to get those at first, so if you need the new version just be sure to order RUT955*03**0