If you fancy the Sony Xperia SP, check out this eyebrow-raising offer at T-Mobile. You can grab the smartphone for £249.99 on PAYG, with 4G-readiness, and no top-up required. Yikes.
Sony Xperia SP specs include a 4.6in 720p display, dual-core Snapdragon S4 Pro processor, Jelly Bean (Android 4.1) and an 8MP rear camera.
(Thanks to aramaj36 at HUKD)