get a document from firestore with a required phone number

I have a collection of users in have created docs names as per their UID and each doc has a field "phoneNumber" , I want to get a SINGLE Document In numberArray i have some selected numbers to be searched

      itemCount: number.length,
      itemBuilder: (context, index) => FutureBuilder(
        future: FirebaseFirestore.instance
            .where('phone', isEqualTo: number[index])
        builder: (BuildContext context, AsyncSnapshot<dynamic> snapshot) {
          if (snapshot.hasData && != null) {
            return ListTile();
          else return Container();