The answer to this question is complicated. You can legally purchase phone numbers, since there is no law that forbids you to do this. When you are buying phone numbers, you are essentially purchasing data. However, it is what you do with those purchased phone numbers that determines if you stay on the legal side of the law or not. Read on to find out more about what you can or cannot do with purchased phone numbers.
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You and I both know it would be! Well, the SOLUTION is to put automated information between YOU and your PROSPECT. So lets do the same voice broadcast or ringless voice drop to 1,000 prospects on a Tuesday afternoon but this time around, you use your (NEW) sms mobile number as a "buffer" between YOU and the PROSPECT. In other words, they have to go through your phone marketing system BEFORE they can get a chance to talk to you.
Once you have done the analysis, determined your goal and formulated your hypothesis, it’s time to set up your test. The best way is to do an A/B test. An A/B test compares version A (the original version) to changes made in a version B while all other conditions are kept the same. If you send the test to a big enough group of recipients and all conditions (e.g. time of day, day in the week, type of audience etc.) are kept the same, an A/B test will let you conclude whether the results can be attributed to the made changes or whether they happened due to chance. 
First, you collect the opt-in, which 9 times out of 10 will be a 'cold lead', ie., someone (NOT) familiar with you or what you represent. So instead of immediately going into full-on presentation mode, which isn't good for you or your prospect, you create a buffer where the prospect can learn more about YOU in a safe space. The reason this is important nowadays is because your prospect is more interested in you, your story and why you choose to align with your primary program, even more so than his or hers interest in the biz opp itself.
The advancement of mobile technologies has allowed the ability to leave a voice mail message on a mobile phone without ringing the line. The technology was pioneered by VoAPP, which used the technology in conjunction with live operators as a debt collection service. The FCC has ruled that the technology is compliant with all regulations.[36] CPL expanded on the existing technology to allow for a completely automated process including the replacement of live operators with pre recorded messages.[37] By optimizing the technology, marketers can utilize the process to increase engagement of their product or service.
There is a lot of competition[26] in this field as well. However, just like other services, it is not easy anymore to rule the mobile application market. Most companies have acknowledged the potential of Mobile Apps to increase the interaction between a company and its target customers. With the fast progress and growth of the smartphone market, high-quality Mobile app development is essential to obtain a strong position in a mobile app store.

In order to start a conversation with a text message, it has to be personal, so this is the best method available to start a conversation with someone from whom you have a cell phone number. They can reply to your first text message directly back to you and you can take on the conversation from there (i.e. for a big ticket, don't use a robot, your prospect is an individual, like you, that you want to respect.)
Try running a contest exclusively for mobile customers, where by signing up for text messages they can be entered to win a free product or service. Or by signing up for your “inner circle” they can be eligible to participate in regular contests, such as trivia games, voting for their favorite product or service, or any other kind of contest or competition you can come up with. Holding regular fun contests is a great way to keep your customers engaged.
Collecting phone numbers at your brick and mortar place of business is as simple as filling out forms or collecting business cards, but what about online? Again, that can be as simple as asking customers to email or text you their information, or you can go high-tech and actually set up an online form, linked from your website, Facebook page, or even advertising links.
Sample size indicates the size of the group of people who are going to receive your message. The size of this group and the amount of conversions you’re getting determines the significance of your test. Significance refers to whether we can rely on the made changes to have generated these results, or whether we can’t rely on the changes, but see that the results were simply due to chance. What this really means is that we want to be able to say: we can be 95% sure that the changes we made will improve our conversion rate. 
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Businesses have been collecting customer information for years by offering a birthday freebie, i.e. a free product or service on your birthday. Customers are more likely to trust you with their phone number if they get some sort of reward in return. You can also send them one-month, six-month, or one-year “anniversary” bonuses based on their sign-up date.
The FCC implemented the Telephone Consumer Protection Act of 1991 (the “TCPA”) adopted rules, including prohibiting the initiation of telephone calls (other than a call made for emergency purposes or made with the prior express consent of the called party) using automatic telephone dialing systems or an artificial or prerecorded voice to telephone numbers assigned to a paging service, cellular telephone service, specialized mobile radio service, or other radio common carrier service, or any service for which the called party is charged for the call.
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