When out I only able to use my data 1% of the time. It’s very annoying as I have lots of data

[Heather73]

I have lots of data yet out and about my phone goes to 3G or E and can only use the data 1% of the time. This has been an issue for a few months now and I am seriously thinking of going to another phone company. A couple of months ago myself and many others had no data when out for 72 hours or more and sky did nothing but give lame excuses. Any one else having same issues? Thanks