YES; if your message is of transactional nature (i.e. an appointment reminder, delivery notification, business continuity or staff rostering), or a marketing message intended for people with whom you have an existing customer relationship, you can send SMS without needing consent (you must, of course, provide an opt-out on all marketing messages).
When it comes to people with whom you do not have an active customer relationship, text message communications fall under the same PECR requirements as email marketing communications. You should get permission from prospects to receive promotional SMS prior to any sends, as well as providing opportunities to change their preferences and opt-out.
Per most telecom operators’ fair usage policy you should be able to send up to 5,000 SMS per month on a single SIM card. Always check your operator’s fair usage policy first. If you want to send more texts, you can get another SIM contract.Download the SMS chat android App