Elasticsearch, combining nested filter with normal filter

You have two keys with the name "filter" (in "filtered"), so one of them is going to get ignored. You probably just need to wrap your two filters in a "bool" (bools can be nested as needed).

I can't test it without setting up some test data, but try this and see if it gets you closer:

{
   "size": 100,
   "sort": [],
   "query": {
      "filtered": {
         "query": {
            "match_all": []
         },
         "filter": {
            "bool": {
               "must": [
                  {
                     "terms": {
                        "category.untouched": [
                           "Chargers"
                        ]
                     }
                  },
                  {
                     "nested": {
                        "path": "phones",
                        "filter": {
                           "term": {
                              "phones.name.untouched": "Galaxy S3 Neo I9301"
                           }
                        }
                     }
                  }
               ],
               "should": [],
               "must_not": {
                  "missing": {
                     "field": "model"
                  }
               }
            }
         },
         "strategy": "query_first"
      }
   },
   "aggs": {
      "category.untouched": {
         "terms": {
            "field": "category.untouched"
         }
      },
      "brand.untouched": {
         "terms": {
            "field": "brand.untouched"
         }
      },
      "price_seperate": {
         "histogram": {
            "field": "price_seperate",
            "interval": 10,
            "min_doc_count": 1
         }
      },
      "phones.name.untouched": {
         "nested": {
            "path": "phones"
         },
         "aggs": {
            "phones.name.untouched": {
               "terms": {
                  "field": "phones.name.untouched"
               }
            }
         }
      }
   }
}