What is it?

When shoppers access your Attentive sign-up unit through Facebook's or TikTok's in-app browser on iOS, they see a manual phone number entry form instead of Attentive’s patented two-tap flow.

Here's why: Both platforms don't reliably support the patented two-tap flow in their in-app browsers. With this feature enabled, shoppers enter their phone number directly into a form, then reply to a confirmation text to opt in—no app switching or redirects needed.

When does this apply?

This experience activates automatically when:

• A shopper is using TikTok's or Facebook's native mobile app
• They click through to your site (including links in bio, captions, or ads)
• They attempt to sign up for SMS via an Attentive sign-up unit

On other browsers and Android traffic, shoppers experience the standard two-tap flow.

What does the shopper experience?

1. They see a sign-up form asking for their phone number
2. They enter their number and submit
3. They receive a confirmation text and reply to confirm their opt-in
4. They're subscribed to your SMS list

Everything happens in the browser—no app switching, making it fast and frictionless.

How does this work?

Standard SMS sign-up flow:

• Shopper taps phone number field → directed to Messages app → receives SMS → replies to confirm

Manual entry flow (TikTok/Facebook optimized):

• Shopper enters phone number directly into the form on the page
• Receives SMS confirmation text
• Replies to the confirmation text to complete opt-in
• Everything stays in the browser

How to enable it

Once enabled, this feature activates automatically for all TikTok and Facebook in-app traffic. No additional setup needed per platform.

Depending on what you see in your Attentive account, follow these steps:

Option 1: If you see a "Preview manual entry fallback" option, follow these steps

1. Open your sign-up unit settings by clicking Edit design (it appears when you hover over the image of the unit) 
2. Click into the SMS unit
3. Click In-app browser manual entry fallback from the left-side navigation menu
4. Toggle on manual entry fallback for Facebook and/or Tiktok, as needed

5. Toggle on Preview manual entry fallback to see a preview of the sign-up unit as it will appear in the native mobile app for Facebook/Tiktok
6. Save your changes

Once enabled, shoppers on TikTok and Facebook will automatically see the manual entry form.

Option 2: If you see “Layers" in your sign-up unit builder, follow these steps

1. Open your sign-up unit and select Manage from the variant dropdown

2. In the right-hand drawer, toggle both TikTok and Facebook on

3. Save your changes

Can I customize this?

This feature uses all the same customization options as your regular sign-up units—form styling, colors, fonts, copy, and more. For detailed customization instructions, see Design a sign-up unit.