Google introduced their SMS Search service in 2008. I wrote an article about it (Receive answers from Google on your cell phone.) shortly afterward and have been using it since then on my dumbphone (a T-Mobile Samsung T-439 cell phone). It’s wonderful for checking weather, looking up addresses and phone numbers, etc.
A couple weeks ago, it suddenly stopped working. Google SMS replied “Sorry, “______” does not return any results.” Yesterday morning, it resumed working, with no indication of why it broke.
Many Google services are great when they work. Their free-of-cost nature, though, means that Google makes no commitment to service level.