The issue of trust is the great advantage that lies at the heart of SMS marketing. Because people are reluctant to give out their numbers, few businesses have those numbers, and so fewer marketing texts are sent compared with marketing emails. The result is that customers are unlikely to get bored with marketing texts the way they've become bored by marketing emails.
The privacy issue became even more salient as it was before with the arrival of mobile data networks. A number of important new concerns emerged mainly stemming from the fact that mobile devices are intimately personal[42] and are always with the user, and four major concerns can be identified: mobile spam, personal identification, location information and wireless security.[43] Aggregate presence of mobile phone users could be tracked in a privacy-preserving fashion.[44]
As we enter the holiday season, it is always useful and rewarding to reflect back on the past year. Not only is it a time for gratitude, but it is also a time to observe lessons learned along the way. 2018 has been an exhilarating ride at Conversica, and the company is doing well by any objective standard. Serving over 1,000 customers worldwide, we have helped our customers generate over $10 billion in incremental revenue. In addition, Conversica was just named one of Deloitte’s Technology Fast 500, a list of  fast-growing companies releasing emerging technologies, while at the same time securing the largest Series C round ever, at $31 million, for a conversational AI company.
Mobile marketing via proximity systems, or proximity marketing, relies on GSM 03.41 which defines the Short Message Service - Cell Broadcast.[33] SMS-CB allows messages (such as advertising or public information) to be broadcast to all mobile users in a specified geographical area. In the Philippines, GSM-based proximity broadcast systems are used by select Government Agencies for information dissemination on Government-run community-based programs to take advantage of its reach and popularity (Philippines has the world's highest traffic of SMS). It is also used for commercial service known as Proxima SMS. Bluewater, a super-regional shopping centre in the UK, has a GSM based system supplied by NTL to help its GSM coverage for calls, it also allows each customer with a mobile phone to be tracked though the centre which shops they go into and for how long. The system enables special offer texts to be sent to the phone. For example, a retailer could send a mobile text message to those customers in their database who have opted-in, who happen to be walking in a mall. That message could say "Save 50% in the next 5 minutes only when you purchase from our store." Snacks company, Mondelez International, makers of Cadbury and Oreo products has committed to exploring proximity-based messaging citing significant gains in point-of-purchase influence.[34]
There is no other method that comes close to SMS in terms of reach and reliability. And that goes for their open rates as well. Clients can easily skip over a social media or mobile app push notification that appears briefly on the screen and then disappears. Emails are rarely even opened and when they are, it may be long after the event or promotion you were advertising took place.
For a more cost-effective solution, you can register a keyword on a shared short code, which means you will be assigned a unique SMS keyword but you will share the short code with other businesses. These short codes are great for competitions or lead generation for example, where customers can SMS your keyword and their details to the shared number to enter or request a quote or more information about your products and services.
One drawback of qr codes is that some people are not familiar with QR codes. There are still a lot of people in society who do not know what the QR code stands for, although QR codes can be seen almost everywhere in our lives. Many companies trying to use QR codes to promote their own products as well as looking for potential customers, but if the customer does not know how to find the information through the QR code, they seem to may not purchase a product or service. Another major drawback of QR codes is that they rely on mobile devices or smartphones. The whole concept of a QR code and its benefits are based on its ability to be scanned by mobile devices. If consumers, like older people, do not have mobile devices or smartphones, qr codes are not good for them.[31]

In order to gain their mobile number, they will have to have a great deal of trust in you and a pre-existing relationship will help. They also need to know that what you'll be sending them via SMS message is exclusive offers, not the same offer that you give via email and social media. Be clear with your customers and use the following guidelines when introducing SMS marketing to your customers:
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