How fast is the mobile phone top up from abroad?  

The recharge process is typically swift, completing in just a few seconds after payment confirmation. However, there can be occasional delays when a large number of users attempt to take advantage of a newly launched promotion. Such congestion usually eases within a few hours on the first day. During these peak times, some mobile operators with older systems may queue top-ups to process them later. While there aren't many such operators left globally, if a top-up is marked as pending, it's advisable to wait briefly as the issue often resolves on its own.