How to update LG v40 AT&T without AT&T SIM

[Madness_logic]

so i bough this from amazon, im living in Costa Rica, and recently know there is an update to Adroid 10 and i try almost everything, until i discover that i need a AT&T sim to update ¬_¬", is there a way to do it without it? or, if i bough one from ebay or so, can i update it from here? thanks

 

[KouaV1]

so i bough this from amazon, im living in Costa Rica, and recently know there is an update to Adroid 10 and i try almost everything, until i discover that i need a AT&T sim to update ¬_¬", is there a way to do it without it? or, if i bough one from ebay or so, can i update it from here? thanks

no you cant, only way is to get a sim card and this is for all carrier models. This is the reason why you buy LG's factory unlocked phone made from them and not branded.