mobile

hello, as im outside usa, and i have a htc one m7 verizon , i cant wifi hotspot and cant use 4G ,and i dont get any updates, so Please is there any one help me to get rid of this , i need to install stock android , the original rom that they make for htc one m7 international version , i dont like to install other roms to it, i wanna install the stock, where can i find it, any link for it?? and how to install it without rooting, ??