Carphone Warehouse PAYG upgrades let you keep your number and your existing credit, while saving up to 40% on a brand new handset - with no top-up required.
Eligible? You can currently grab the 4G-ready Samsung Galaxy S4 mini for £109.99, on T-Mobile or Orange, and in black, purple or white. To give that price some context, the same phone will cost you £229.99 SIM free!
Samsung Galaxy S4 mini specs include a 4.3in display (540 x 960), Qualcomm Snapdragon 400 processor, 1.5GB of RAM, 8GB expandable storage, 8MP rear camera, 1.9MP front camera, and 1,900mAh battery.
(Thanks to cambers at HUKD)