Im trying to find the cheapest way to go about getting infrequent use mobile broadband PAYG using a MIFI device. Ive found that Orange do a free Huawei WiFi E5332 if i take out a 30 day contract at £30 a month. I thought that I could get the MIFI device and then cancel the contract straight away so I would only have it for a month. This would give me 5GB for the first month (which i wouldnt really need) but id have a free MIFI. The E5332 is selling for upwards of £30 anyway and 3G or HSDPA speeds are fine for me. Ive seen people on ebay offering an MIFI unlock service for 99p. Ive looked at OVIVO , T-Mobile and Three PAYG SIM ONLY deals and all of them look quite good. Obviously Ovivo is a one off cost but with t-mobile if you go over their fair use limit they still allow browsing so that would be handy. My question is, if i unlocked the E5332 would it definitely work on all these networks? I don't want to tie myself into Orange.