help. Problem prefix in incoming calls j327p

[ltindi32]

Greetings. I have a j327p emerge boostmobile and the problem is the following. I use it with h2o which is at & t and the problem is that when they call me, the number is registered without the prefix. Bone, example in the case here in p.r. +787 or +939. 1 is not recorded which is the prefix that is assumed to be + 1-787 or + 1-939. The problem is that if you enter as I said at the beginning, I can not return the call unless I dial manually. This problem happens to me with all samsung sprint or boostmobile unlock. Thank you for any suggestions or help