horrible situation with my silly Dsis

[mysister]

dont really know if she's over-reaction or i am wrong.sorry if long,trying not to dripfeed.
me and family live in different countries.already in december DSis kept making little digs,eg:we were talking about her and DM going to a christmas market,then she started saying how it's not fair that is always her doing this kind of things with DM.well,hello!i live in a different country!apparently i should go 3 week before christmas to do this kind of things(tree decorating etc)as anyway im home "doing nothing"(i'm a SAHM).anyway,went home at christmas,we decide to get DM a phone,i go choose it etc as DSis"always does everything".
Mum happy with the phone except it doesnt work with whatsup(that why she wanted a new phone),even tho in the shop here in the uk it comes with whatsup already in.
tried to fix it with service provider but went back 2 days after christmas so didnt have much time(shops close 25-26th).
couple of days after im back,and sis trying to fix bloody phone,she calls me(i thought to try and come up with ideas etc)
as i answer on skype she starts yelling and swearing,i ask her to stop as kids are in the room,she doesn't,i end the call.she calls me back,i ask if shes finish,she isn't,starts again with yelling and swearing,i end the call again.
since then she doesnt answer my messages,i tried to say to stop making such a scene,i got my mum crying about it and my father asking me to make peace,how can i if she doesnt bloody answer me!!!
AIBU not to contact her again?
or any advice?

I can see both sides TBH.

It must feel annoying to be the sole sibling that needs to/it is assumed will do stuff for/with parents because of location. But swearing on Skype having been told DC are there is bad form.

thing is i do everything i can from here.help with choosing presents etc.but i cant go there for over 3 weeks so i can decorate the tree!

She's out of order for swearing and yelling at you.

But if she's not usually particularly highly strung then I'd probably be really concerned that she must be at the end of her tether and try and find out what I could do to help out more with the parents.

I think you need to speak to her to see what else you can do to help with your parents. It's obviously getting too much for your sister and you might be able to do something more (from a distance).

My MIL does everything for her mother as her sister is abroad and her brother far away. I honestly don't think they realise how much she does and the day to day stress of it all, as she's the only one who's around to do it. Her siblings swan in for holidays (all the nice bits basically) and then bugger off thinking they've done their bit until next year. I feel annoyed on her behalf tbh.

parents are not in need of help,not very elderly and healthy.so there's not caring for them and such.i cant see the problem.i would try understand but shes just shunned me since.all the anger about the phone is as she things i didnt research properly(i did.)she has a habit of behaving as if she's my employer or something.i say if you want things done excatly as you like then do them yourself.

tailtwister i assume you are talking about your MIL having to car for her mum?as in she's very elderly/ill?
i already decided with my sis that when the time comes i'm more then ready to have both or the remaining parent to come live with us.so i cant see what she's so worked out about

Yes, she is fairly elderly mysister and I assumed from your sister's reaction that your parents were too (wrongly, so apologies).

In that case I would just let her be and get back in touch when she's ready. It sounds as if she's under stress for another reason and the phone thing was the straw which broke the camel's back so to speak.