I do around a week a month in another country and I currently use the $50/mo T-Mobile plan that gives me free 2G-ish data in 100+ countries. But I am tired of the slow data and paying for a 2nd line - I have ATT in the USA - so I decided to try KnowRoaming.

1st problem: I tried to install it all while on a trip (Amsterdam) but couldn't figure out part of the registration process till I got back and had back and forth with their support team.

2nd problem: after I registered, I couldn't apply the promised credit without another back and forth with support, which keeps telling you to watch some stupid video instead of telling you how to fix the issue.

3rd problem: on the next trip (Accra), it took me most of the day and multiple emails to their support line (first response: watch a video!) to get the system working. Once it was working, it seemed to work fine.

4th problem: once back in the USA, I couldn't get data. It took a bit of fiddling (I'd given up on their support line by now) to get my data working again.

5th problem: I couldn't get messages either, which they don't warn you about, and that took me signing out/back into my Apple ID on the phone to re-authorize the phone number.

Overall, a real pain in the butt for no real savings. Had I been fully able to use KnowRoaming while in Amsterdam or Accra, I would've been spending way more than $50 on data (even with their $8/day unlimited), so I'm better off with 2 lines and zero problems than all that hassle to get onto and then off of their service.

Now I still need to figure out how to peel off their sticker and get their code off my phone.

So if you travel often, don't KnowRoaming. Go T-Mobile and save yourself a headache.