To reply to all of OP's comment
This is what mainstream media wants you to think. Except it is not true, and I am not sure why it keep getting posted after this has been explained again and again.
Apple doesn't sell services to its iPhone sales / shipment, which is what you are trying to say a declining iPhone, whether it is by revenue or by unit, will have a detrimental effect on its services.
Apple sell its services to its Active User base, which as of last official reported number is sitting at 900M and still growing. They keyword here is growing. Apple reported to have an increase in Active user in all of their Operating region. The word operating here means countries or region with Apple Store. And they will likely reach 1 billion Active iPhone user in 2020, which was something I half jokingly projected in 2016, never thought it could really happen.
And for Datapoint, there are roughly ~3.5 Billion Smartphone user worldwide.
So Apple could have less iPhone sold, but as long as their customer are still living within Apple's ecosystem. They will be fine.
And just another note, Apple has been extremely conservative in their iPhone est and guidance. And hence all of their YoY drop are still within their own guidance, with the exception of last Q4 where they had to issue a warning. And in all cases iPhone has been doing better than even Apple's own internal expectation, apart from China.
And to my prediction of iPhone price,
$769 - iPhone 11
$999 - iPhone 11 Pro
$1099 iPhone 11 Pro Max
All starting with 128GB - so you are getting a better deal than last year, and those storage will be much needed to provide better experience on Apple Services such as Game and TV.
So depending on how you view it, iPhone 11 has a price hike from last year's entry level $749, or price drop of $30 from last year's XR similar storage capacity of 128GB.
And China will get a slightly better official pricing than last year.
And this exclude any effect from Tariffs. So US pricing may be different, but international pricing should be same as last year. Assuming your currency had similar value agains the USD in the past 12 months.