I have an iphone 6+ in the UK and am going to Florida next week and would like to get a 1 month service that includes 3G or 4G data speeds, minutes and texts. My main concern is coverage quality. The last time I was in Florida, I bought a cheap handset and a plan from t mobile and my son had the same from at&t but the coverage was rubbish and you could barely hear anyone on the phone or find a good connection. Maybe it was the handset, but we had different phones and different carriers and both were pure crap. Should I expect better performance if I use my iphone? Also, can anyone suggest a carrier or sim card deal that I can pop into my iphone for 1 month service while I am there? I will be mainly around Miami/Miami Beach and also in Tampa for a few days. Thanks for any advice.