There are multiple issues in your query, like:

• a missing comma at line 5
• use of df instead of qf for edismax
• use of mm outside of the edismax block.

Proper syntax should be more like:

{
  "query": {
    "bool": {
      "should": [
         {"edismax": {"qf": "phones" , "query": "111 222 333"}},
         {"edismax": {"qf": "phones2", "query": "111 222 333"}}
       ],
       "minimal_should_match": 2
      }
    } 
}

Also please report the exact errors from the parser, because "It does not work" does not help us helping you ;-)