EXHIBIT 21

Case 2:23-cv-00444-JRG Document 1-22 Filed 09/27/23 Page 1 of 9 PageID #: 295
U.S. Patent No. 77

0857364 

Claim 1 Identification 

Ir pre l A conference call To the extent the preamble is limiting, Defendants provide a conference call telephone system: 

telephone system, comprising: 

Call screen 

After accepting a call, the interface functions are 

as follows: 

• Speaker: Enables loud speaker mode during 

call. 

• Keypad: Opens the dial pad. 

• Mute: Mutes the microphone. 

• Add call: Adds multiple cal ls. 

• Hold: Allows you to answer a new call by 

putting the current call on hold and then 

resume the current call when the new call 

ends. 

https :/ /www .sprint.com/content/ dam/ sprint/us/en/ device-assets/ one-plus/ oneplus-9-

5 g/ documents/OnePlus 9 5G User Manual V2.1.pdf 

Page 1 

Case 2:23-cv-00444-JRG Document 1-22 Filed 09/27/23 Page 2 of 9 PageID #: 296
Claim 1 Identification 

Fans lined up to be the first to get the OnePlus 6Tsmartphone on October 29, 2018 at T·Moblle's Times Square Signature Store 

"We're excited to continue our partnership with T-Mobile," said Pete Lau, CEO and Founder of OnePlus. "In 

fact, users can get their hands on the OnePlus 7 Pro for the very first time at the T-Mobile Times Square 

store on May 14, with takeover events at T-Mobile stores in Chicago, Las Vegas, Miami, San Francisco and 

Santa Monica on May 15." 

https ://www.t-mobile.com/news/press/ oneplus-7-pro-partnership-exclusive 

Page2 

Case 2:23-cv-00444-JRG Document 1-22 Filed 09/27/23 Page 3 of 9 PageID #: 297
Claim 1 Identification 

[lj OnePlus Community Home My circles All circles Store 

Hi everyone, 

This week we took two major steps forward. 

The first, of course, was the introduction of our newest device, the all-new OnePlus 6T. This device 

is filled with incredible technology that has helped us to continue innovating and exciting our users. 

We can't wait to hear your reactions and hope that you love what we have helped create hand-inhand with you! 

The second was the announcement of our exclusive partnership in the United States with T-Mobile. 

Since OnePlus began, we have been committed to share the best technology with the world and 

ensure that no user has to settle for anything less. As we have watched our community grow in the 

United States, we received a lot of feedback about how to grow and reach a wider audience for the 

amazing technology we've created. The United States is different in that many users first think of 

their wireless provider when they think of smarlphones. 

In order for us to share our message and passion, we saw that partnering with another company 

was essential in fulfilling our main mission. We didn't want just any partner, we wanted a partner 

that shared our ideology and would support us for who we are and what we value. As we carefully 

considered our first partner in the United States we were continually led back to T-Mobile. T-Mobile 

has disrupted the wireless industry and even brands themselves as the "Un-Carrier." Their growth, 

commitment to listening to users, and brand identity could not have been more perfect to continue 

building a great community here in the United States. 

https://community.oneplus.com/thread/933398 

Page3 

Case 2:23-cv-00444-JRG Document 1-22 Filed 09/27/23 Page 4 of 9 PageID #: 298
Claim 1 

1 [a] one or more network; 

1 [b] three or more telephone 

units interconnected by said 

one or more network to provide 

three or more paii icipants of a 

conference call, at least one of 

said telephone units receiving 

and sending data packets 

including voice data oackets: 

Identification 

tmo_mike_c r.mzm1 

Yes. we do! It's called conference calling and it would be included with the unlimited talk plans. 

-

0+1s ~ ke " Q..iote 

https://community.t-mobile.com/accounts-services-4/three-way-calling14920?postid=l 10279#postl 10279 

!.wigs:. Airtime usage is measured from the time the network begins to process a call (before the phone rings or the call is answered) 

through its termination of the call (after you hang up). For voice calls, we round up any fraction of a minute to the next full minute. 

Depending upon your Rate Plan, data usage may be rounded at the end of each data session, at the end of your billing cycle, and/or at the 

time you switch data plans. You may be charged for more than one call/message when you use certain features resulting in multiple 

inbound or outbound calls/messages (such as call forwarding, call waiting, voicemail, 'conference callind. and multi-party messaging). You 

will be charged for text, instant or picture messages, and email whether read or unread, sent or received, solicited or unsolicited. We use 

filters to block spam messages, but we do not guarantee that you will not receive spam or other unsolicited messages. Additional blocking 

options are available at www..my I -Mobile com. Most usage and Charges incurred during a billing cycle will be included in your bill for that 

cycle. Some usage and Charges may be delayed to a later billing cycle, which may cause you to exceed Rate Plan allotments in a later billing 

cycle. Unused Rate Plan allotments expire at the end of your billing cycle, You may be billed additional Charges for certain features and 

services. Charges for Wi-Fi usage may vary; see your Rate Plan for more details. 

https://www.t-mobile.com/responsibility/legal/tenns-and-conditions 

The system comprises at least one network. 

The system comprises three or more telephone units interconnected by said one or more network to 

provide three or more paii icipants of a conference call, at least one of said telephone units receiving and 

sending data packets including voice data packets. 

For exainple, when three OnePlus phones connect to provide a conference call using 5G. 

Page 4 

Case 2:23-cv-00444-JRG Document 1-22 Filed 09/27/23 Page 5 of 9 PageID #: 299
Claim 1 

1 [ c] a display connected to at 

least one of said telephone units 

or forming a pait of at least one 

of said telephone units; 

Identification 

Experience America's largest and fastest 5G network on the latest 

SG-enabled phone from OnePlus, only at T-Mobile. 

https://www.t-mobile.com/devices/newest-oneplus-phone-updates 

The system comprises a display connected to at least one of said telephone units or fo1ming a paii of at 

least one of said telephone units. 

For example, the telephone units include a screen. 

Page 5 

Case 2:23-cv-00444-JRG Document 1-22 Filed 09/27/23 Page 6 of 9 PageID #: 300
Claim 1 

1 [ d] a device for monitoring 

calls of at least one of said 

telephone units to provide data 

to said display for showing 

conference call participant 

infonnation as to the telephone 

units paiiicipating in the 

conference call; 

Identification 

Screenshot of OnePlus 9 

The system comprises a device for monitoring calls of at least one of said telephone units to provide data 

to said display for showing conference call paiiicipant infonnation as to the telephone units paiiicipating 

in the conference call. 

For example, hai·dwai·e/softwai·e inside the telephone unit provides data to said display as to the 

telephone units pa1iicipating in the conference call. 

Page6 

Case 2:23-cv-00444-JRG Document 1-22 Filed 09/27/23 Page 7 of 9 PageID #: 301
Claim 1 

1 [ e] an input device associated 

with said display for selecting 

any of the telephone units from 

the conference call paiiicipant 

infonnation and dro in the 

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Conference call 

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Identification 

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The system comprises an input device associated with said display for selecting any of the telephone 

units from the conference call paiiicipant infonnation and dropping the selected telephone unit from the 

conference call. 

For exain le a user can ress the button to han 

Page? 

Case 2:23-cv-00444-JRG Document 1-22 Filed 09/27/23 Page 8 of 9 PageID #: 302
Claim 1 

selected telephone unit from the 

conference call. 

)j] ' • \] I) f O I m ~ - ~ i 

Conference call 

00.54 

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Identification 

2:31 \. IP O ~ C': 0 • l?li!.,1 

f- Manage conference call 

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Page 8 

Case 2:23-cv-00444-JRG Document 1-22 Filed 09/27/23 Page 9 of 9 PageID #: 303