I live in Silicon Valley and am using a 5s. The phone's data speeds were blazing fast when I got it, now they're crawling. Symptoms:
- Slow data speeds, even basic things like refreshing email crawl on LTE (OK on wifi)
- Generally have only two bars of LTE. Occasionally I see up to 4 but it's rare.
- Data is largely unusable if I'm indoors - so slow that I end up needing to hop on a wifi network or just give up.
- Sometimes switching LTE off yields more bars, data speeds are still slow.