Best value, unlocked, global android device for dedicated bitcoin wallet.

Hi,

I am wondering if I might get some recommendations for those more in the know than I, about android devices which would be suitable for use as a dedicated bitcoin wallet.

Ideally, it would be a global device (is is quad band now?), which is also unlocked so could run local data SIMs from any country I entered (primarily europe and asia if that makes any difference)...

I only want to use it as a wallet so cost is obviously an element, but I am usually interested in the *value* I am getting, rather than outright final cost. Also, becuase it will be used for wallet only, I do not mind so much about a lot of the common selling points for these kind of devices, I do not particularly mind if key stretching or encrypting/decrypting wallets takes a few moments longer.

Obviously being a bitcoiner, security is high priority!

I have been looking at things like the HTC Desire 610 or maybe the Moto G Mk II but they are £180/£150 respectively which is a fair bit more than I had hoped tbh. Just wanted to get some expertese from the android/bitcoin crowd here before I go any further...