A single SMS message has a maximum size of 1120 bits. This is important because there are two types of character encodings, GSM and Unicode. Latin-based languages like English are GSM based encoding, which are 7 bits per character. This is where text messages typically get their 160 character per SMS limit.[13] Long messages that exceed this limit are concatenated. They are split into smaller messages, which are recombined by the receiving phone.

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?”
For minor to medium calculated businesses the price of open up air advertising and marketing like Newspaper ads, adverts and so forth is about the very best. However, Bulk SMS Campaign vendors have minimal established up and jogging bills. Battles could be propelled and actualized fora slight part of expense, still you'll be able to get in touch with 1000's customers in a very issue of seconds.
Please take everything I have mentioned above seriously or you might end up well let’s just say in some kind of trouble. So my advice to you sir would be to engage service that operates out of US soil for example Europe but that is capable of providing you service where you need it. A perfect fit for this would be Hottelecom. More details can be found here.
The need to generate subscribers does not go away after your text marketing campaign launches. You should keep a continual focus on acquiring more mobile numbers to grow your subscriber base. Oftentimes, getting a new customer to subscribe is simply a matter of letting them know the option to receive texts exists. Think outside the box and utilize different marketing channels to advertise your opt-in keyword and short code to drive new subscribers.
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.