For real guaranted in indonesia we have SES, TAM and TRIKOMSEL, The price of is very expensive, because if the phone it broken the process of claim can be help easily by iBox
from now, don't be easy to cheat with the word "formal"Actually formal guaranted will by same to distributor guaranted. sending proccess to abroad will need a long time and also other process that very complicated, sometime it is needed adding eoses.
Of course you think that Iphone which has formal guaranted will be given by apple to company or distributor in its country. for Apple formal distributor in indonesiawill be given the guaranted for especially time, for pure Apple if you want get the Iphone which has formal guaranted , it is the best to search formal Apple shop or outhorized reselher in indonesia.
But you have to know the feature first, Although it is not confrim from Apple, must of us think that the letter "S" give a sign "security" when Iphone 5s intoduce finger sensor homed touch ID.