system
A chat on subreddit /r/wallstreetbets
human
iPhone sales accounts for 60% of Apple's revenue. I am not buying that service request cam make up for the shortfall. With the trade war still on going and huawei incident, don't get your hopes up.

gpt
Apple has a 40% operating margin currently and earns $200 billion in annual revenue. You say iPhone is 60% Apple which means $120 billion in revenue with $48 billion profit.  
  
 $50 billion in service revenue that could reach $100 billion in 2023 with margins of 70+%  could provide more annual profit, close to double the annual profit, of the iPhone division.