Boss Double XL (M-5390) is specifically built keeping in mind how useless the phone is without a good battery. M 5390 come with a 2200mAh battery which you don’t get to see in many handsets. It is a very powerful one giving backup for a very long time. You can save up to 500 contacts and 1000SMS in this phone. It’s a low cost phone provided with a 6.6cm display and digital camera to click images and record. The phone not just provides the 1.3MP camera for clicking photos but you can use it as a webcam as well to chat with others. The phone comes with personal management applications like Alarm, Calculator and Calendar and also supports HINDI Language. Apart from a very strong battery the phone has a very big sound too. The handset comes with dual speakers on which you can play your most loved music and enjoy them on a loud and clear sound. It’s a very nice phone and provides good hearing too. This phone is a low budget phone and is designed keeping in mind the basic necessity of the phone. The privacy lock can used to protect your phone and privacy. Overall it’s a first class phone.