Identification: Help ID'ing beautiful, deep pink flower

I was hoping I could ask for your help identifying this plant.

It has deep pink (one could say red) flowers, with yellow/orange on the inside. There are 5 petals, and the leaves are smooth. I tried to look it up on plant ID'ing searches, but didn't have any luck.

I got it from someone who was throwing it out and didn't ask, and would like to know how to take care of it.

A million thanks,
Natalia

 

Looks like Mandevilla sanderi, possibly M. s. 'Rosea'.

 

Wow, thank you so much!!! I really appreciate it.