I guess you can achieve this with PowerShell script,
#Disable Mobile Redirection for all browsers for a given web application
param( [Parameter(Mandatory=$true, ValueFromPipeline=$true, Position=0)]
[Microsoft.SharePoint.PowerShell.SPWebApplicationPipeBind]
$WebApplication)
# SharePoint cmdlets
Add-PSSnapin Microsoft.SharePoint.PowerShell
if([Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint")-eq$null){throw "Unable to load Microsoft.SharePoint.dll";}
$WebApp = $WebApplication.Read()
$configMod1 = New-Object Microsoft.SharePoint.Administration.SPWebConfigModification
$configMod1.Path = "configuration/system.web"
$configMod1.Name = "browserCaps"
$configMod1.Value = '<browserCaps><result type="System.Web.Mobile.MobileCapabilities, System.Web.Mobile, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" /><filter>isMobileDevice=false</filter></browserCaps>'
$configMod1.Sequence = 0
$configMod1.Owner = "contoso\administrator"
## SPWebConfigModificationType.EnsureChildNode -> 0
$configMod1.Type = 0
$WebApp.WebConfigModifications.Add( $configMod1 )
$WebApp.Update()
$WebApp.Parent.ApplyWebConfigModifications()
Remove-PsSnapin Microsoft.SharePoint.PowerShell
got this script from this article:
http://gavinb.net/2011/06/13/disable-mobile-redirection-for-a-web-application-via-powershell/
Hope this helps!