AngularJS synchronous $http calls and database insertion

We are making android app in ionic, i am using cordova sqlite db. i am making multiple $http calls to get data from different api. i am inserting data of each api in database. the problem is that, when i am calling first api and inserting data in db, the next ajax is called before complete insertion of first api data. in ios platform it's initiating memory issue and closing the app forcefully. really looking forward for this issue to be solved from many days.

self.setApm_reference_t = function()
{
    $http.get(ApiEndpoint.url+'/references')
                  .success(function(response) {
                      console.log(JSON.stringify(response));
                      for(var i=0;i<response.length;i++){
                      $cordovaSQLite.execute(db, "INSERT INTO apm_reference_t (reference_id, apm_id, salutation, firstname_vc, middlename_vc, lastname_vc, designation_vc) VALUES(?, ?, ?, ?, ?, ?, ?)", [response[i].reference_id, response[i].apm_id, response[i].sal_vc, response[i].firstname_vc, response[i].middlename_vc, response[i].lastname_vc, response[i].designation_vc]).then(function(result){
        console.log("inserting in setApm_reference_t");
    },function(err){console.log(JSON.stringify(err));});
            if(i == response.length-1)
                {
                    self.setApm_contact_t();
                }
                      }
                      }).error(function(error){
        console.log(JSON.stringify(error));
        self.setApm_reference_t();
    });
},
self.setApm_contact_t = function()
{
    $http.get(ApiEndpoint.url+'/apmContacts')
          .success(function(response) {
              console.log(JSON.stringify(response));
              for(var i=0;i<response.length;i++){
                  $cordovaSQLite.execute(db, "INSERT INTO apm_contact_t (apm_contact_id, apm_id, tel_vc, reference_id) VALUES(?, ?, ?, ?)", [response[i].apm_contact_id, response[i].apm_id, response[i].tel_vc, response[i].reference_id]).then(function(result){
                        console.log("inserting in setApm_contact_t");
                    },function(err){console.log(JSON.stringify(err));});
                    if(i == response.length-1)
                    {
                        self.setDepartment_t();
                    }
                  }
              }).error(function(error){
        console.log(JSON.stringify(error));
        self.setApm_contact_t();
    });
},
self.setDepartment_t = function()
{
    $http.get(ApiEndpoint.url+'/departments')
          .success(function(response) {
              console.log(JSON.stringify(response));
              for(var i=0;i<response.length;i++)
              {
                  $cordovaSQLite.execute(db, "INSERT INTO department_t(department_id, departmentHeader_id, department_vc, departmentMr_vc, is_deleted) VALUES(?, ?, ?, ?, ?)", [response[i].id, response[i].departmentHeader_id, response[i].department, response[i].departmentMr, response[i].is_deleted]).then(function(result){
                        console.log("inserting in setDepartment_t");
                    },function(err){console.log(JSON.stringify(err));});
                    if(i == response.length-1)
                    {
                        self.setContact_t();
                    }
              }
              }).error(function(error){
        console.log(JSON.stringify(error));
        self.setDepartment_t();
    });
},
self.setContact_t = function()
{
    $http.get(ApiEndpoint.url+'/contacts')
          .success(function(response) {
              console.log(JSON.stringify(response));
              for(var i=0;i<response.length;i++){
                    if(response[i].insert_date == null)
                    {
                        response[i].insert_date = "0000-00-00 00:00:00";
                    }
                    $cordovaSQLite.execute(db, "INSERT INTO contact_t (contact_Id, name_VC,nameEn_VC, designation_short_VC, contact_IN, insert_date, update_date, delete_date, is_cmo) VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?)", [response[i].id, response[i].name_VC, response[i].nameEn_VC, response[i].designation_short_VC, response[i].contact_IN,  response[i].insert_date, response[i].update_date, response[i].delete_date, response[i].is_cmo]).then(function(result){
                        console.log("inserting in setContact_t");
                    },function(err){console.log(JSON.stringify(err));});
                    if(i == response.length-1)
                    {
                        self.setApm_location_t();
                    }
                  }
              }).error(function(error){
        console.log(JSON.stringify(error));
        self.setContact_t();
    });
},