Grey Routing is a term given to messages that are sent to carriers (often offshore) that have low cost interconnect agreements with other carriers. Instead of sending the messages directly to the intended carrier, some bulk SMS providers send it to an offshore carrier, which will relay the message to the intended carrier. At the cost of consistency and reliability, this roundabout way is cheaper, and these routes can disappear without notice and are slower. Many carriers don’t like this type of routing, and will often block them with filters set up in their SMSCs.
This is why they designed their own customized queue logic and set up intelligent call routing flows. With the new routing logic Apartment List was able to classify the caller need and assign them to the right agent. Minimizing wait times and maximizing efficiency, the online directory has drastically increased call volume and improved customer satisfaction.
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.)
A custom sender ID, also known as an alphanumeric sender ID, enables users to set a business name as the sender ID for one way organisation-to-consumer messages. This is only supported in certain countries and are up to 11 characters long, and support uppercase and lowercase ASCII letters and digits 0-9.[12] Senders aren’t allowed to use digits only as this would mimic a shortcode or virtual number that they don’t have access to. Reputable bulk SMS providers will check customer sender IDs beforehand to make sure senders are not misusing or abusing them.
The system automatically keeps track of the numbers for which it delivered ringless voicemail's. It automatically deletes those numbers from your list so that they cannot accidentally be dialed again. There will be numbers for which an RVM cannot be successfully delivered on the first day you dial it. We will set the system to keep trying those numbers. This does not cost you anything, because you only pay for successfully delivered RVMs.
Unfortunately, this is a loaded question because one portion of the question is 100% legal and then one portion of the question is 100% illegal. So, let me explain. You can purchase mobile phone numbers. There is many data brokers that are out there that will sell you mobile phone numbers. On the other hand, you cannot text message those phone numbers because it is illegal. So, while you can, yes, buy mobile numbers, you cannot text message those phone numbers. Now why can’t you text message those phone numbers and why is it illegal? Well, here in the United States, we have the FCC. And FCC developed federal law called the Telephone Consumer Protection Act. It’s pretty long but some people call it the TCPA. And essentially, it says you cannot text message consumers without their consent. And it has to be prior consent. It can’t be consent after the fact because that’s really not consent, I think. So, in the TCPA, it’s very clear that you cannot text message customers without their consent. Now, if you do text message customers without their consent, so let’s say you purchased a list of mobile phone numbers, and you text message those phone numbers, that would be text messaging people without their consent. Now, if you do that, under the TCPA, which is federal law, consumers have the right to sue your business for anywhere between $500 and $1,500 per text message. Now that’s not text message you sent out. So if you send 1 text message to a million people, you’re not gonna be sued $500 to $1,500, you’re gonna be sued for a million times $500 or $1,500. So you can see that buying phone numbers, while that is usually cheap, the consequences of buying mobile phone numbers and then text messaging those phone numbers can be in the millions or hundreds of millions of dollars. So you do not want to buy mobile phone numbers and text message them because while it is legal to buy the phone numbers, it is 100% illegal to text message those phone numbers that you purchased that never gave your business consent to send text messages to them. So hopefully that answers the question as to, “Can you buy mobile phone numbers for text message marketing?”
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. 
Whether you post the offer in your local business, on your Facebook page, or, preferably, both, don’t start off with “Give us your phone number.” Phrase the offer with something along the lines of “Join our inner circle to receive advance notice of sales and promotions, exclusive mobile coupons, and one-day only offers.” Customers should feel that by signing up for your text messages they will get perks and benefits that other customers won’t be privy to.

By now, you have a pretty clear idea of what you need to improve to reach your goal. But how are you going to do that? You need to form a hypothesis about what you think would work better than the message you have now. You may already have some ideas about things that might work based on previous experiences. Or you may have no idea where to start. You can start with evaluating some email/SMS marketing best practices and see whether these would fit for your business. You will only know whether these are suitable for you once you start testing, but it gives you a solid starting point. 
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