Wisepops logo

Last updated Thu Apr 04 2024

How to Collect Phone Numbers for Text Marketing

Thinking about launching an SMS campaign for your business but not sure how to start collecting phone numbers? Don’t be discouraged, text marketing is definitely worth the effort.

SMS has a lot of things going for it: very high response rates (45 percent as compared to 6 percent with email) and even higher open rates (98 percent as compared to only 20 percent with email).

But before you take the dive and start sending offers to your entire phone list, let's take a look at the regulations.

Collect phone numbers with popup and forms on your website
Try Wisepops free 🧰
sms popup example

Why Buying Phone Numbers Lists Is a Bad Idea

It may be tempting to buy a list of cell phone numbers and start sending them promotions without asking them first.

Don’t do it.

The Telephone Consumer Protection Act clearly states that doing so is a violation of customer privacy and punishable by law.

While buying a cell phone list is not illegal, texting customers who haven’t opted into your marketing program is. Customers have to specifically give you permission to text them and that permission will not come with a bought list. If you send promotional texts to someone who hasn’t opted in, start preparing to face some hefty fines.

A customer who has received unsolicited text messages from you can sue you for $500 – $1500 for every unwanted message.

And the list of repercussions doesn’t end there. Instead of attracting new prospects, you get a group of angry people who will now associate your business with spam and lack of respect for their customers. Even if they could’ve been potentially interested in purchasing from you, now your number will most likely get blacklisted.

When is someone considered "opted in"?

An “opted in” or "subscribed" customer is someone who has specifically given consent for you to send them promotions.

How to Collect Phone numbers

Use SMS popups

Use website popups (so-called SMS popups) to catch your visitors directly when they are on your website.

A simple desktop and mobile popup can help you invite them to join your marketing list.

Online businesses use popups like that:

collect phone numbers

Or like that...

Or like that:

collecting phone numbers

If you'd like to collect phone numbers with SMS popups, grab a free account Wisepops (4.8 Shopify rating) and get started:

Unlimited free trial, no cc needed. Learn more about Wisepops popups


"Wisepops helped me in many ways. I increased my conversion rate with marketing messages displayed at the right moment thanks to their targeting options... Last but not least, it integrates very well within my stack (Klaviyo for emails and Postscript for SMS)...

Alexander B., Trustpilot

Giveaways and Contests

Contests are an exciting way to increase opt-ins. Giving away free things or letting customers win something, whether big or small, can really help to amp up your list of subscribers.

Offer something that represents your brand well so you can be sure that the subscribers will stick around. For example, the Fresh Foods grocery store offered a $20 gift card for participants who signed up for their text messaging club.

This type of contest inspires participant brand loyalty and ensures that the new opt-ins are actually interested in your product and not just a fancy prize. For best results, advertise the contest across all channels: email, website, social media and in store

contest to collect mobile numbers


Email is one of the oldest digital marketing platforms. Because of that, you may have a very large list of customers who receive emails from your business.  So, why not make it a 2-for-1? If a customer has already opted into your business email list, then you can send them an email letting them know about your promotional texts.

signup form for mobile phones

Many customers today prefer text to email, with a full 66 percent preferring that businesses contact them through text over any other communication channel.

Make sure that your promotions are different for each channel to avoid repetitive offers and subsequent opt-outs. Your social media should be different from your emails which should be different from your texts, etc.

Related: Email list building strategies

Technique #4: Get Them Excited

A message like “Text XYZ to 111111 to receive our weekly newsletter” is a pretty boring opt-in message. Try something that reveals the value of joining your text program. Like “Type ICECREAM to 111111 to try a new gourmet flavor every week this summer!”. A prompt that doesn’t let them know what they can expect and doesn’t inspire them isn’t likely to win many subscribers.

sms advertising example

Just as with other marketing channels such as email, messages that incite curiosity and have an air of urgency are also winners. By letting them know there’s a deadline to your sign-up offer, you increase urgency. Try something like “Send MARTENS to 23849 by 11/03/2018 to get 20% off your new pair of legendary Dr. Martens boots.”

Addressing customers by name also provides a personal touch. The more they feel you know what they want, the more willing they’ll be to get promotional texts from you. That means more subscribers.

Provide Opt-Out Information

You must provide customers with opt-out instructions. These instructions must be clearly explained in the text itself.

Unsubscribing is usually done by texting STOP to a specific number. If a customer opts out, you must stop texting them immediately.

The pizza franchise Papa John’s faced a lawsuit in 2017 for spamming. The customer had opted in but claimed the franchise sent an endless stream of promotional texts. When the customer tried to opt-out, the company ignored his request. In Papa John’s case, the customer sought damages of $500 per unwanted text. This can result in heavy fines so be sure to pay attention to this important detail.


To collect phone numbers for text marketing, smart businesses first learn the laws of text marketing. Remember not to send unsolicited messages to customers, even if they’ve subscribed to other marketing channels. Get them to opt-in first.

After that, the sky’s the limit. Entice them with contests. Get them excited with intriguing texts. Send them personalized messages that make them feel VIP. Advertise your SMS program on other channels.

And always make sure that customers have a way to opt-out. By using these techniques, you can enjoy a successful text marketing program. Good luck and happy texting!

Greg D'Aboville

Greg is a former Head of Growth at Wisepops. He has a degree from the ESSEC Business School and has been working in digital marketing since 2014.