RC76xx firmware variants

IoT Modules RC76
1

What is the difference between the following firmware variants?

  • R9.0 (Generic - PTCRB): RC7611, RC7611-1
  • R9.0 (US Cellular): RC7611, RC7611-1
  • R9.0 (Sierra): RC7611, RC7611-1
2

i saw this in release note:

image
image933×518 88.5 KB