Apple reported $89.5 billion in revenue for the second quarter, smashing estimates as it continues its iPhone 12 high and stores return to normal operations

• Apple kicked off 2021 with $47.9 billion in iPhone sales as the iPhone 12 lineup remains a hit.
• iPhone production wasn't impacted by the chip shortage, but MacBooks and iPads reportedly are.
• All of Apple's US stores were also open in March for the first time since last year.

Apple reported $89.5 billion in revenue during its 2021 fiscal second-quarter, which ran from January to March for the phone maker.

The company's Q2 saw all of its stores open for the first time since the start of the pandemic. And while its iPhone production was unaffected by the sweeping global chip shortage, its MacBooks and iPad are reportedly postponed due to the semiconductor crisis.

Here's a look at the key numbers. Analyst estimates are based on Yahoo Finance data.

Here are the key numbers to watch from Apple's Q2 earnings:

• Q2 2021 revenue: $89.5 billion. Analysts were expecting $77.3 billion.
• Q2 2021 earnings per share (EPS): $1.40, versus Wall Street estimates of $0.56.
• iPhone revenue: $47.94 billion. Analysts were expecting $41.49 billion.
• Services Revenue: $16.9 billion, versus analyst estimates of $15.65 billion.
• Wearables Revenue: $7.8 billion versus analysts' estimates of $7.52 billion.

Apple's fiscal second-quarter revenue is a dip from what was a record-breaking Q1 for the company when it reported more than $100 billion in sales, a first for the tech giant. The boom was in part driven by the holiday season and the company's iPhone 12 line release in October. Some analysts called the lineup one of the most important launches that Apple has made in years.

Wall Street expects the company to deliver about 220 million iPhone units throughout 2021. iPhone production isn't expected to be impacted by a global chip shortage that is slamming every industry. However, the production of some of Apple's MacBooks and iPad has been delayed since the company pushed back some component orders for the devices to the back half of this year due to the shortage.

All of Apple's 270 US stores were opened in March, marking the first time that the company's retail presence in its entirety was open to customers since the start of the pandemic. However, stores will continue to observe limited capacity and other safety protocols.

Read more: The battle between Facebook and Apple over privacy is about more than just ads - it's about the future of how we interact with tech

Apple faced mounting pressure in its fiscal second-quarter over a privacy crackdown that has begun rolling out. The iOS 14.5 software update, which became available Monday, requires app developers to ask for permission before they collect and track users' data.

Facebook specifically has taken issue with the new feature since it directly impacts the company's lucrative ad business, which is built upon data tracking.

Analysts estimate that Apple will pull in $68.67 billion in revenue for Q3. Apple's fiscal third quarter, which runs from April to June, has already included a virtual event in which the company unveiled a new colorful line of iMac computers as well as a new purple-colored iPhone 12.