Centro FTW.
Rumor Touch is decent esp with Opera Mini
Does it make sense I would have to upgrade my free & clear plan to active the LG rumor?
Nope.
+1Were you told you have to?
Also there is the htc touchpro2
U sure that it doesn't count as a smartphone according to Sprint?
pretty sure it's a smartphone (10/mo fee) it is, however, compatible with sero/legacy plans