We will test your site through various means according to your requirements. We would first consider which browsers and devices to test on. For this, you should consider both which devices your users currently use, and which devices they might use if your site worked correctly on their device.
There are options to test on live devices, emulators and simulators. For desktop, we have PCs and macs. We have iPhone, iPad, Android, Blackberry and Windows Mobile emulators and simulators. We make use of web-based services too.