Q: Can the iPhone 5s, 32,64 GB or 6, 64,128 GB be RFB ?

Maybe you'd like to clarify the question? Not sure what you mean by RFB.

What do you mean by "Can this models be 64 GB ? Or 32GB ?"

Refurbished models come in the exact same configuration as new phones.  They don't make special versions for refurbs.

what are you trying to accomplish?

Apple's warranty will replace your broken phone with a refurbished device with the exact same specs.

Check the validity of your purchase by entering its serial number here:

https://checkcoverage.apple.com

eugen.kuzn wrote:

 

But I did it. I bought a RFB phone 5s 16 GB, from authorized dealer.

No idea what "authorized dealer" you got this from, but I'm not aware of Apple selling "certified pre-owned" iPhones at all. I would be very suspicious...

And did the site tell you you have a warranty?

Might you have purchased a previously owned iPhone?  Check its Activation Lock status here:

https://www.icloud.com/activationlock/

This describes Activation Lock.  Briefly, if your iPhone is Activation Locked, you will never be able to use it.

Find My iPhone Activation Lock - Apple Support

OK, so what exactly is your question?