Are firmware versions limited to a specific hardware revision?

Answer

Referring to the LOCATING THE BL600-SX REVISION NUMBER AppNote, BL600's with the -C0 Nordic Hardware Variant are limited to running v1.5.70.0 or earlier. This would apply to BL600-Sx-01, 02, & 03. BL600-Sx-04 and newer (current is -07) or Nordic Variants -G0 or -H0 can run the more recent versions of firmware (current is 1.8.88.0)