We saw the duo first at Mobile World Congress in Barcelona this year and now Microsoft have announced the pre-order, pricing and availability details for the Lumia 640 and 640 XL.
The two phones will be available in-store from the end of April and the Lumia 640 has been available to pre-order until now from Microsoft's site as well as Carphone Warehouse.
Both the phones have 4G connectivity and come with free OneDrive storage. They will also be first to get the Windows 10 update and O2 will have the 640 available for £99.99 as an inaugural offer.
The phones will be available from end of April for about £15.50 per month on contract with Dixon Carphone Group, EE, O2, Vodafone, Three, Amazon, Tesco and Virgin.
Both the Lumia 640 and 640 XL will be available in the bright colours that we have come to expect from Microsoft's devices. and include ones like glossy cyan and orange and matte black.
Dixon Carphone Group will stock the Lumia 640 exclusively in glossy white.
The Lumia 640 XL will be available from £219 SIM-free in matte cyan, orange and black, as well as both matte and glossy white.
And to help you make up your mind, here are the tech specs:
Operating system Windows Phone 8.1 with Lumia Denim HERE location services Free global HERE Maps and HERE Drive+ Free HERE Transit available in the Store
Display 5” HD (1280x720, 16:9) IPS LCD, 294 PPI, Glance screen Corning Gorilla Glass 3 Sunlight readability enhancements
Battery 2500 mAh battery, removable
Processor 1.2 GHz quad-core Qualcomm Snapdragon 400 processor
Main camera 8 MP AF, LED Flash, Lumia Camera Front facing camera 1 MP FF Memory 8GB + free OneDrive, micro SD up to 128GB
Dimensions 141.3 x 72.2 x 8.85mm 145 g
Lumia 640 XL
Display 5.7” HD (1280x720, 16:9) IPS LCD, 294 PPI, Glance screen Corning Gorilla Glass 3 Sunlight readability enhancements
Battery 3000 mAh battery, removable
Main camera 13 MP AF, LED Flash, Lumia Camera Front facing camera 5 MP FF
Memory 8GB + free OneDrive, micro SD up to 128GB
Dimensions 157.9 x 81.5 x 9mm 171g