Netgear says that Firmwear V1.01.26 is approved by Spectrum for the C6220 modem/router.
Spectrum says that the latest firmware for the C6220 is version V1.01.15. How long do you think it will take for Spectrum to release firmware V1.01.26 for the C6220 to the users?
Why do you think you need new firmware?
What issues are you having? Probably not firmware related.
That's an oddball modem as well, not seen any on here...
Also, if this modem isn't widely used by customers on their network they won't put a lot of resources on it, meaning they will first focus on modems they hand out then focus on popular customer owned models. If the firmware update in question doesn't fix a big security hole or benefit Spectrum's network somehow, it will get pushed down the priority list.
There is really no way for any of the forum volunteers to predict when Spectrum's technical evaluation team will begin or complete their testing process, nor can we guess at the results.