Discerning FL2K devices with LDOs versus switching regulators

[Mac A. Cody]

Greetings,

In Steve Markgraf's slide presentation 
(http://people.osmocom.org/steve-m/fl2k_slides/osmo-fl2k.html),
do slides 16 and 17 imply that some FL2K devices have LDO regulators 
while other
using switching regulators?  Obviously, the FL2K devices that have LDO 
regulators
are preferred, due to fewer spurious RF emissions.  How can one 
determine which
FL2K devices have LDOs?  Can an FL2K device be reworked to use LDO 
regulators?

Thanks,

Mac