It's also under pressure in China, where some consumers are shunning pricey iPhones and local rivals like Oppo and Vivo are grabbing market share.
When Apple reports its latest quarterly earnings on Tuesday, the world's most valuable company is expected to reveal revenues of about $61 billion, after selling an estimated 54 million iPhones in the three months to March.
Apple spent five years developing 3D Touch on its newer iPhone models. According to everything we've seen so far, iPhone X sales will turn out to be decidedly meh, and the real success story of the year is the iPhone 8 and iPhone 7. Morgan Stanley analysts think demand for the iPhone X, 8 and 8 Plus to be "weaker ... ahead of September's expected new iPhone launch".
So what will Apple replace 3D Touch with? Would the LCD iPhone have no 3D touch feature and be made of a different kind of metal.
Some analysts blame the $999 iPhone X.
When the X launched a year ago, Apple paid handsomely for the new Face ID system, stainless steel casing and sharper, more efficient OLED screen technology. According to statistics, iPhone 8 and iPhone 8 Plus bought is better than the iPhone X. Experts predict a further decline in sales of smartphones. In addition to this, Kuo also covered Apple as part of Concord Securities in 2011. Apple used reasonably flexible OLED displays from Samsung for the original iPhone X, which can bend slightly at the bottom. That could bring the price close to $700, a level that's proven successful for many years. If something as trivial as 3D Touch increases costs in production but offers very little in terms of functionality, then it's only logical for Apple to have it removed.
Ming-Chi Kuo has been one of the most valuable and prolific sources of rumors about Apple's unreleased products since 2010.
The Wall Street consensus estimates for the iPhone appears to be that last quarter's sales will be up 2%, and that revenue will be up by 13%, with more to come ...
Bernstein analyst Toni Sacconaghi said weakness in the current iPhone lineup was caused by a structural slowdown in the growth of new customers and the high pricing of the X model. "Big changes are needed in order for Apple to reach an optimal capital strategy in a reasonable amount of time".