from django.shortcuts import render_to_response as render_to_response_pre

def render_to_response(template, context):
    '''
    If the exisiting view uses a template named foo.html, any iPhone
    will trigger the template named foo-iphone.html.
    '''
    if 'HTTP_USER_AGENT' in context['request'].META:
        if 'iphone' in context['request'].META['HTTP_USER_AGENT'].lower():
            template = template.rstrip('.html')
            template += '-iphone.html'
    return render_to_response_pre(template, context)