if(Trigger.isBefore){
       if(Trigger.IsUpdate ){
            
           if(checkRecursive.runOnce()){


                        for(Account acc1:Trigger.New){
                                if(string.isNotBlank(acc1.Mobile_NO_Contact__c) ){
                                    if(acc1.Mobile_NO_Contact__c.isNumeric()){
                                            if(acc1.Mobile_NO_Contact__c!=Trigger.oldMap.get(acc1.id).Mobile_NO_Contact__c){
                                                acclists1.add(acc1);system.debug('acclist@@@@@@'+acclists1);
                                            }
                                    }
                                    else{
                                        acc1.addError('Please enter the valid mobile number');
                                    }
                                }   
                        }// end of for loop for modification  of mobile number.
                        if(!acclists1.isEmpty()){
                                accountTriggerHandler.beforeUpdateMethod(acclists1);
                        }
         
                        for(Account acc2:Trigger.New){
                                if(string.isNotBlank(acc2.Mobile_NO_Contact__c) ){
                                        if(acc2.Present_No_of_Years_in_Current_City__c!=null && (Trigger.oldMap.get(acc2.id).Present_No_of_Years_in_Current_City__c==null)){
                                                if(acc2.Mobile_NO_Contact__c.isNumeric()){
                                                    acclists2.add(acc2);system.debug('acclist@@@@@@'+acclists2);
                                                }
                                                else{
                                                    acc2.addError('Please enter the valid mobile number');
                                                }
                                        }
                                }
                        }// end of for loop.
                        if(!acclists2.isEmpty()){
                                accountTriggerHandler.beforeinsertMethod(acclists2);
                        }
                    }// end if loop for checking profile    
                    for(Account acc:Trigger.new){
                            system.debug('acc.Mobile_NO_Contact__c'+acc.Mobile_NO_Contact__c);
                            system.debug('acc.Customer_Id__c'+acc.Customer_Id__c);
                            system.debug('acc.zone__c'+acc.zone__c);
                            system.debug('Branch_Name__c'+acc.Branch_Name__r.Mobile_Flagging__c);
                            system.debug('Branch_Name__c'+acc.Branch_Name__c);
                            if(string.isNotBlank(acc.Mobile_NO_Contact__c) ){
                                if(acc.Mobile_NO_Contact__c.isNumeric()){
                                    acclist.add(acc);system.debug('acclist@@@@@@'+acclist);
                                    accountIds.add(acc.Id);
                                    branchIds.add(acc.Branch_Name__c);
                                }
                                else{
                                    acc.zone__c='Invalide';
                                }
                            }
                        }
                        if(!acclist.isEmpty()){
                                   accountTriggerHandler.beforeupdate(acclist);// Passing parameters to handler class of Trigger
                        }// end of one time updation
                            
                    }// end of recursion.
            }// end of   update.
        }//end of isBefore
Bold lines code not covering plz help me out
Thnaks in advanced.