After powering on the new device,
the saleswoman carefully picked it up.
She began a thorough, step-by-step setup for Si Nian and Si Qing.
She deftly tapped through menus, patiently explaining every step.
From choosing the initial language to connecting to Wi-Fi.
To privacy policies—she covered every detail.
After a long but necessary sequence.
They finally reached the passcode screen.
Numbers, letters, special characters—entered twice without error.
Next came the voice setup.
Si Nian went first.
The instant she finished recording her voiceprint.
Si Qing, standing nearby, suddenly grinned.
and cheekily shouted, "Hey, Siri!"
At once, the iPhone X resting in Si Nian's hand chirped back, "I'm here!"
The robotic echo made the saleswoman blink.
Jiang Cheng didn't look surprised that Si Qing had awakened her sister's assistant.
Voice assistants rely on advanced recognition tech.
And that tech has limits.
It matches pitch and tone to the enrolled user.
So for two sisters as close as Si Nian and Si Qing.
If their voices are similar.
accidental triggers aren't odd at all.
When Si Nian finished, it was Si Qing's turn.
She lifted the phone unhurriedly and followed the steps.
As usual, Si Nian stayed silent while her sister worked.
Moments later, Si Qing's voiceprint was stored too.
Si Nian then said, "Hey, Siri."
That single call.
brought the familiar reply at once.
Jiang Cheng teased the saleswoman beside him.
"Girl, your phones share voices? That's hilarious!"
The smile on the clerk's face froze.
She knew the model had this quirk.
but seeing it exposed so plainly.
left her mortified.
Watching the awkward stare she gave him, unsure what he'd say next.
Jiang Cheng smirked. "Girl, miracle time—are you nervous?"
Hearing that, the clerk glanced again at the sisters.
Originally she'd sworn the two phones couldn't unlock for each other.
Yet after the voice stunt.
her certainty wavered.
Si Nian and Si Qing looked almost identical.
Same face, same features, same proportions.
Neither was plumper or thinner.
No moles or birthmarks to tell them apart.
To the naked eye.
telling them apart was impossible.
Realizing Jiang Cheng was mocking her guarantee.
the clerk regretted her big words.
Though he'd already paid.
and didn't seem the picky type.
anything could happen.
Who knew if he'd turn fussy?
If the sisters could unlock each other's Face ID, then what?
Customer-clerk disputes filled the news daily.
The more she thought, the more she cursed her own mouth.
Panicking inside, she forced a laugh and covered her mouth.
"Oops, I spoke too soon—please don't let this blow up. If they unlock, let me off easy, okay? You two really are twins; even I'm confused now."
Her words made Si Nian and Si Qing giggle behind their hands.
They hadn't taken her boast seriously anyway.
After testing a few minor new features.
the sisters began scanning their faces.
The process was tedious, but they were meticulous.
Following every prompt.
After several careful rounds, both iPhones finished setup.
Si Nian shut her phone and handed it to Si Qing without worry.
Si Qing did the same, sliding her device to Si Nian.
Then the unbelievable happened.
Si Qing tapped the screen with a slender finger.
It lit up.
And in that instant, Si Nian's phone unlocked for her sister.
The same on the other side.
Si Nian merely touched Si Qing's phone; within a second it opened to the home screen.
Seeing Jiang Cheng and the clerk gaping.
the sisters exchanged a look and wordlessly swapped back.
They pressed power buttons in perfect sync.
Face ID passed again.
Silky smooth.
No matter how they swapped, the phones accepted either twin.
At their mischievous grins, Jiang Cheng and the clerk stared, mouths open, stunned.
Though Jiang Cheng had half expected it.
seeing it still shocked him.
The chatty clerk couldn't form a single sentence.
She didn't even try to laugh it off.
All she could think was—Holy crap!
Finally the sisters burst into tinkling laughter behind their hands.
Si Qing cleared her throat and cooed, "Oh, forgot to mention—we breeze through facial-recognition gates too."
Jiang Cheng spread his arms in surrender. "This is insane!"
It was the first time the twins had splurged on such pricey phones.
They were clearly elated.
Si Nian quipped, "It's super fast—apart from the Face-ID mix-up, everything's great."
Si Qing nodded eagerly. "Yeah, so smooth! Aren't you getting one, Cheng?"
Jiang Cheng shook his head.
He was using a Huawei Mate 10 Pro.
It had its flaws, but the lack of Face ID let him sleep easy.
No risk of a girlfriend unlocking his phone while he slept.
Most tests said closed eyes wouldn't fool it.
Yet online videos showed it sometimes worked.
Of course, Jiang Cheng had the Danger Perception Skill.
He'd sense any intrusion.
Still, better to avoid the risk—less trouble that way.