A very nice start to the week! I enjoyed the "phone" theme, and the non-theme answers were full of good stuff! SYMBIOSIS (5D: Relationship between barnacles and whales, e.g.) (I had "symbiotic" for a long time), COLOSSEUM (12D: World's largest amphitheater), and DAPPERDAN (38D: Sharply dressed guy) (Frannie liked this one a lot) were all interesting and unusual, and who doesn't love TATERTOTS (36D: Cylindrical alternative to French fries)? And the doubling up of the tens was a little bonus in the NE and SW.
Very little AWFUL fill, and a few that were, like, OHWOW. It seems I'll never remember that SAGO is a 44D: Kind of palm, and RARED (6D: Stood on hind legs, with "up") taught me that I've been wrong thinking it's "reared" all this time. Are they related? My dictionary is not at hand. Perhaps I'll comment on this again later, or maybe someone will look it up for me.
In short, I loved it.