Sending SMS to Customers: The Mistakes That Cost Israeli Businesses Thousands

The mistakes nobody talks about

Over the last ten years I've worked with hundreds of Israeli businesses starting with marketing SMS. Some saw amazing results from day one. Others? Burned money, annoyed customers, and in the worst cases — got fined.

The difference between the two groups almost always comes down to the same recurring mistakes. Here are 8 mistakes I see over and over — and how to avoid them.

Mistake 1: Blasting the whole list, all the time

The most common mistake. "I have 5,000 numbers — I'll send to all of them!"

The problem? Not every customer cares about the same thing. Someone who bought baby gear from you 3 years ago doesn't necessarily still need baby gear. Someone who bought a ball gown isn't necessarily looking for sneakers.

What happens when you send to everyone? Opt-out rates rise. Customers get annoyed. And the messages that are relevant — lose their effect, because the customer is already "numb" to your messages.

The fix: segment. Even simple segmentation — by date of last purchase, by product category, by average order size. Even splitting into 3 groups makes a huge difference.

Mistake 2: No opt-out option

Besides being illegal (fines up to ₪1,000,000), it's also a stupid move commercially. A customer who can't opt out feels trapped. A trapped customer — hates you. A customer who hates you — writes a bad Google review.

Always add "Reply STOP to opt out" or an opt-out link. And when someone asks — honor it immediately. Not "within 7 business days." Immediately.

Mistake 3: Messages on Friday–Saturday and holidays

Ever got a marketing SMS on a Saturday afternoon? How did it feel? Exactly.

Even if there's no law banning Saturday sends, the Israeli audience — secular, religious, traditional — doesn't like getting ads during rest time. It touches an emotion, and touching that emotion negatively is not profitable.

Send Sunday–Thursday, between 09:00 and 20:00. Friday until 13:00 if needed. Shabbat and holidays — no.

Mistake 4: A message that's too long

70 characters in Hebrew. That's what you get in one message. You can send 2 or 3 concatenated messages, but every additional message costs money — and the customer won't necessarily read to the end.

I've seen 4-message concatenations (280 characters) that tried to cram in the business history, 3 different promos, terms of use, and a phone number. Nobody reads that.

The rule: one message. One point. One action. If you can't say it in 70 characters — rethink what you actually want to say.

Mistake 5: No call to action

"Winter promo! Discounts on everything."

OK, and what's the customer supposed to do with that? Drive to the store? Visit the site? Call? Send a carrier pigeon?

Every message must end with a clear action: "To shop: [link]," "To reserve a table: [phone]," "To book an appointment: [link]." Without it, the message is noise.

Mistake 6: Old, dirty lists

If you haven't cleaned your contact list in the last year, you have a problem. Disconnected numbers, numbers that were replaced, numbers that were never valid. Every message to an invalid number is money in the trash — and worse, it reduces your delivery rate, which can start getting you blocked by carriers.

The fix: clean the list every 3 months. Remove numbers that haven't engaged in six months. And run HLR Lookup (number validity check) before sending to an old list.

Mistake 7: Ignoring the data

You sent a campaign. 5,000 messages. And now what? "Feels like there were more customers in the store today." Feels?!

If you don't measure — you don't improve. Check delivery rate, click rate, opt-out rate, and especially — how much money the campaign brought in. Without numbers, you're shooting in the dark.

Mistake 8: Only sending promos

If every message the customer gets from you is "20% off!" "Sale!!!!" "SALE!!!!!!" — they'll learn to ignore. Worse, they'll learn there's no point buying from you at full price because there's always a sale.

Mix in content that adds value: a useful tip, an interesting update, a personal greeting. Not every message has to sell. Sometimes a message that builds a relationship is worth more than one asking for money.

The most expensive mistake of all

Of all the mistakes, the one that costs most is actually the simplest: not using SMS at all. Businesses that are afraid to "disturb," that think SMS is "spam," that feel uncomfortable sending — miss the marketing channel with the highest response rate that exists.

With Vibrate, it's easy to start right and avoid all these mistakes. Hebrew UI, automatic opt-out management, detailed analytics, and built-in segmentation. Sign up free and start on the right foot.