Would I meet any issues for bulk SMS compaigns or if I want to congratulate 1000 clients?
1. Take in account the fact your mobile operator charges you for every SMS.
2. 1 SMS can contain up to 160 symbols. If you want to send a long text of 2 or more parts, then 1 part can contain up to 153 symbols.
Keep in mind spaces are to be accounted like any other symbols!
3. There is another limitation of mobile operators: you can send up to 60 text messages (parts) per hour. This is why GnomGuru sends SMS onу by one.
So if you send messages to 1000 clients it will take some time to deliver texts to all of them.
Describe your problem and we answer as soon as possible