Work experience, no. But I did have someone from India call and ask me what my bra size was to sell me a bra. o___o And wouldn't take no for an answer.
Here in Sweden we get people calling with Indian and sometimes even Russian like accents and such. (Don't know where in the world they are though, it's not Sweden though, their connection suck too much.) Though instead of bras they're telling us our computers have sent them warning messages and they are form Microsoft or Windows or whatever. On top of that they're speaking in English, which they wouldn't if they were for real. Cause 1. our computers don't send out messages with our number without our permission to the company, and 2. We're in Sweden. Even if it did, it would be someone speaking Swedish that would call us about it. So they're pretty much trying to scam people off their money o.O I think it costs more for them to call than what they get though xD
Either way, my first experience with them was around two years ago when they rang for the first time. My dad said no and refused to speak to them again, but they kept calling TEN TIMES, so in the end I just unplugged the phone. It's not like my parents had to suffer the constant ringing. They were outside working in the garden while I was inside working on my computer xb
After that I have dealt with them in different ways. A few times I told them how full of bullshit they were and we knew they were just trying to scam us off our money. They hang up after realizing we wouldn't listen. But sometimes they still kept on ringing. So now a days (The last two weeks. They've been ringing every other day. Always different people) I just tell them that we don't have a computer. Most of them just hang up immediately, but there was this one guy who kept on asking "do you have a laptop or something like that?" And I was like "... ... Who doesn't call their laptop a computer?" I don't know if that's true in English speaking countries, but in Sweden we generally say computer about our laptops too. After maybe a minute he got it and said good bye. That was pretty nice actually. most of them just hang up without a word as fast as I told them that there wasn't a computer in my home. (Which is a total lie. We have four working laptops, two that's in use, one that's about to retire, and one that's a reserve in case something happens to the others. One installed stationary computer, and one that my dad should have installed but still hasn't fixed. Then I think we have one or two really old ones put away in a closet somewhere.)
So that's the weirdest experience I've had with international callers. (And the only experience) I haven't had any job where international calls would be needed, and it would cost me way too much to call friends internationally. (That's what skype's for.) So on that I lack experience xD