Currently, Apple requires its smartwatch to be connected wirelessly to an iPhone to stream music, download directions in maps, and send messages while on the go. Equipped with LTE chips, at least some new Apple Watch models, planned for release by the end of the year, will be able to conduct many tasks without an iPhone in range, the people said. For example, a user would be able to download new songs and use apps and leave their smartphone at home.

Intel Corp. will supply the LTE modems for the new Watch, according to another person familiar with the situation. That’s a big win for the chipmaker, which has been trying for years to get its components into more Apple mobile devices. Qualcomm Inc. has been the main modem supplier for iPhones and other Apple mobile gadgets, but the two companies are embroiled in a bitter legal dispute. Apple added Intel as a modem supplier for some iPhones last year.

Apple is already in talks with carriers in the U.S. and Europe about offering the cellular version, the people added. The carriers supporting the LTE Apple Watch, at least at launch, may be a limited subset of those that carry the iPhone, one of the people said. However, AT&T Inc., Verizon Communications Inc. and T-Mobile US Inc. in the U.S. plan to sell the device, according to other people familiar with the matter. The new device could still be delayed beyond 2017 — indeed, the company had already postponed a cellular-capable smartwatch last year. Apple declined to comment.

While the Apple Watch remains a small part of Apple’s overall revenue, Chief Executive Officer Tim Cook said earlier this week it’s the best-selling smartwatch “by a very wide margin.” Sales of the device grew more than 50 percent in the third quarter, Cook added. In the larger wearables category, which includes cheaper fitness bands, Apple ranks third behind Xiaomi Corp. and Fitbit Inc., according to research firm Strategy Analytics. Apple does not break out sales numbers for the Watch like it does for iPhones, iPads, and Macs.

Making the Apple Watch more of a standalone device may boost sales of the product. “It would be a game changer,” said Gene Munster, co-founder of Loup Ventures and a long-time Apple analyst. “If they could deliver an experience that isn’t tethered to an iPhone, it could kick start a new direction for the business.” Still, he’s concerned about battery life in such a device.

Last year, Apple took a step toward making the Apple Watch a more independent device by selling some new models with a GPS chip. This allows the device to accurately track distance traveled by wearers when they leave their iPhones behind on walks or runs. The company had planned to release an LTE-capable model last year, but chose to hold off due to battery life issues, Bloomberg News reported at the time. Cramming an LTE radio into a device as small as a watch remains a challenge, but Apple has been exploring ways to improve battery life, people familiar with the company’s work said.

In addition to adding a cellular chip to the Apple Watch, the Cupertino, California-based company is planning software changes for the device. WatchOS 4 is coming in the fall with more Siri voice-enabled features, the ability to connect to gym equipment, send payments in iMessage and display news stories, Apple said in June at its Worldwide Developers Conference.

Apple announced the Apple Watch Series 2 alongside the iPhone 7 line in September. The company plans to debut three new iPhone models this fall, including one with a revamped design and a 3-D facial recognition scanner for unlocking the device, Bloomberg News has reported. Apple could choose to debut its new Watch models alongside the new iPhone like it did last year. Apple also plans to release its Siri-driven HomePod speaker and the iMac Pro desktop computer in December, the company said in June.