Upgrade doubt

Hello. I have this version of firmware in my kw88: 01/06/2016 patch level, band version MOLY.WR8.W1449.MDWG.MP.V6P17,2016 / 07/29 18: 03, Sat 03/10/72 kernel version 3 Sep 2016 12:50:29 CT and number of complilacion KW88_CS1_B_GSM_PHT_20160903.
Well my question is: the clock asks me update the firmware , if I update I lose the function to install the faces?

I´m sorry my english.

I’m running fw 20160921 and I’m still able to install custom clock faces, as before.

Y has encontrado alguna mejora en el reloj?

And have you found any improvement in the clock?

If you are having constant reboots, that might improve, battery also, but (i dont wanna be a negative influence on your decision) i lost GSM connectivity. Im not able to register in my network anymore. I dont know if the problem appear with the ota updates i did, or if its defective hardware. You should get opinion with other forum members too.