By Aniruddha Ghosh and Nivedita Balu

(Reuters) – Apple Inc (NASDAQ:)’s customers will have to wait for a few more weeks to lay their hands on the new iPhone 13 as supply chain delays and strong demand lead to one of the longest waiting times for the phone in recent years, analysts said.

As one way to gauge customer demand for Apple’s latest flagship smartphone, analysts monitor Apple’s delivery time after each new launch. This year it also shines a spotlight on supply chain challenges plaguing technology firms ahead of the holidays.

Analysts at J.P.Morgan and Credit Suisse (SIX:) said customers across the world who had pre-ordered the new models online would have to wait more than four weeks for the iPhone 13 Pro and Pro Max and about 2 weeks for the base iPhone 13.

Over a third (or more) of iPhone shipment shipments are to the United States. The iPhone 13 Series delivery took 19 to 35 days, while the iPhone 12 Series delivered in 7 to 20 working days.

Apple could not be reached for comment about the delay in delivery times.

Samik Chatterjee, J.P.Morgan’s analyst at J.P.Morgan, said that although some of this increase is due to the supply chain limitations, it was still indicative of high demand and exceeding investor expectations.

Apple partners Verizon (NYSE) and Vodafone (NASDAQ: UK) cited the high demand for their products and issues with product supply in responses to customers via Twitter (NYSE). Social media users also complained about the delay.

You might cancel your order if you have a delayed delivery of the iPhone 13 Pro Max. They talking (about until) October 30th,” one user said on Twitter https://twitter.com/Chico_DeBarge_/status/1440044634244206593.

Several Apple and Tesla Inc suppliers (NASDAQ.) Inc suspended production at Chinese factories over the weekend to meet tighter energy consumption policy. The move put at risk supply chain in peak season for electronic goods.

iPhone 13 is priced at $699 to $1,599 and features a better camera, new bionic chips, and enhanced connectivity. Pre-booking is possible since September 17.