Hi Lucas,
+
+ string UmtsBand [readwrite, optional]
+
+ Frequency band in which the modem is allowed to
+ operate when using "umts" mode. Setting this
property
+ has an imediate effect on modem only if
+ TechnologyPreference is set to "gsm".
Should be "Setting this property has an imediate effect on modem only if
TechnologyPreference is set to "umts"."
BR,
Rajesh