The Sony Xperia Z made waves with its IP57 water, dust and heat durability. Now, rumours are swirling that another tough Sony Xperia smartphone may be coming, this time with IP58 durability rating. According to these rumours, this new tougher smartphone may be called the Sony Xperia ZR. Tech specs for the Sony Xperia ZR may include the following:

• 1.5GHz Quadcore Snapdragon S4 Pro processor
• 2GB RAM
• 13MP Exmor RS camera
• 4.6-inch screen (720p)
• 8GB storage
• 2300 mAh battery
• 10mm thick + 140g weight