Dear Customers This is to inform that although, Apple has released IOS-12, it seems to be giving some problems on iPhone 5s and earlier versions. Therefore, you are requested to refrain from running IOS-12 on these phones until early next week, after which Apple would be releasing a new carrier version-33.1 to resolve this issue. We will update on our website, as soon as Apple releases this new carrier version. Thruebab Tashidelek! Bhutan Telecom Ltd.