In reply to Green Porridge:
If the galaxy mini is the size you're after then it's at least a (downgrade of) a flagship model. I prefer the bigger and higher spec originals, but to be fair they are A) bigger B) More expensive.
What would you use it for on the internet? (How many videos/image sites, how much browsing).
300mb is relatively puny. The 7.2mb/s could chew through that in about 5 minutes at max speed. 1gb at least these days, that should be relatively cheap too. 300 mb would get you your emails/weather app updates for a month but not a whole lot more (some very light browsing). I know your browsing is light but A) Overhead is good B) Usage can/will change over 2 years.
I got a s3 on a 1gb tariff once, it's easily doable. But after upgrading to 4g and to a better phone then 2-3 gb became the average for me. However, I did just use around just below 5gb last month (3 days without internet at home).
The better the phone/internet service the more data you will use. The S5 has a download booster (4g + wifi combined for silly speeds) which data provided sees you leaving the 4g on almost permanently for the lulz).
Post edited at 02:36