I have to capture the First Name of this customer by considering the <Account_Contact IsPrimaryMVG="Y"> tag to make it unique correlation. Rest of the below xml tags need to skipped.
<PersonalContact>N</PersonalContact>
<EmployeeNumber>1-4P220V9</EmployeeNumber>
<AccountIntegrationId></AccountIntegrationId>
<PrimaryAccountName>Britta Ann Charlott Pejok</PrimaryAccountName>
<PrimaryOrganization2>Telia SP</PrimaryOrganization2>
<MobilePhone>46725093216</MobilePhone>
it's not perfect but something like the regexp below in advanced mode should do the trick:
<Account_Contact IsPrimaryMVG="Y">[\s\S]*?<MobilePhone>(\d*?)</MobilePhone>