I was a fan of this app until I discovered that some text messages were not sent by Pulse sms. No idea why... Because there were emoticons (standard ones from Android) in the text or line breaks!? I copied problematic text messages to the default Oneplus app and there it worked. This happens when answerings from the app. Answering from the Android notification generally works. What is the purpose of a texting app if text messages are not sent!? This is a serious bug if you ask me.