I have a visualforce page with contct information such email and mobile phone number. The field is a standard phone numbe rfield on the Contact object but when it is display on my VF page it loses its format. I'm not sure what i can do to correct the rendering so it shows up on my the account object with the correct format. Any help would be greatly appreciated. My code is below.

<apex:page standardController="Account" extensions="SiteServicePartnerExtController" >
    <apex:pageBlock title="My Content">
        
        <value="{!sspList}" var="item">
        <apex:column  value="{!item.Service_Partner__c}"/>
        <apex:column value="{!item.Contracted_Services__c}"/>
        <apex:column value="{!item.Primary_Field_Contact__c}"/>
        <apex:column value="{!item.Primary_Field_Mobile__c}"/>  
        <apex:column value="{!item.Primary_Field_Email__c}"/>
        <apex:column value="{!item.Contracted_Services__c}"/>
        <apex:column value="{!item.Secondary_Field_Contact__c}"/>
        <apex:column value="{!item.Secondary_Field_Mobile__c}"/>
        <apex:column value="{!item.Secondary_Field_Email__c}"/>
      
        </apex:pageBlockTable>
</apex:pageBlock>
</apex:page>

Custom controller:

Public Class SiteServicePartnerExtController{
   private Account acc;
   public List<Site_Service_Partner__c> sspList {get;set;}
   
   public SiteServicePartnerExtController(ApexPages.StandardController sp){
       acc = (Account)sp.getRecord();
       sspList = new List<Site_Service_Partner__c>();
       sspList = [SELECT Id,Name,Site_Account__c,Primary_Field_Contact__c,Service_Partner__c,Primary_Field_Email__c,Primary_Field_Mobile__c,Service_Partner_Site_Status__c, Contracted_Services__c,Secondary_Field_Contact__c,Secondary_Field_Email__c,Secondary_Field_Mobile__c  FROM Site_Service_Partner__c WHERE Site_Account__c =: acc.Id];
    
    Set<Id> bidId = new  Set<Id>();  
    for(Site_Service_Partner__c bs:sspList){
       bidId.add(bs.Id);
    }
     
   }

}

​​​​​​​