# Troubleshooting Find the cause of a failed send, missing reply, or calling problem. 7 articles - [Troubleshoot pending or failed messages Work out whether a send was rejected, is still awaiting confirmation, or needs help from support. 3 min read](https://missblue.dev/help/articles/troubleshoot-message-delivery) - [Understand new-contact limits and send pacing Separate rolling new-contact capacity from short-term rate limits and other sending checks. 3 min read](https://missblue.dev/help/articles/understand-sending-limits) - [My number is sending as text messages instead of iMessage Why a number’s messages can go out as green bubbles for a few days, what we do about it automatically, what helps it recover, and how you will know it is back. 3 min read](https://missblue.dev/help/articles/sending-as-text-messages) - [Prevent duplicate messages from retries and automations Trace repeated sends and make a retry decision without messaging the customer twice. 2 min read](https://missblue.dev/help/articles/prevent-duplicate-messages) - [Troubleshoot calls, microphone access, and missing audio Check the calling mode, device permissions, and recording state before retrying a call. 2 min read](https://missblue.dev/help/articles/troubleshoot-call-audio) - [Fix an attachment or voice note that will not send Check file format, upload progress, image grouping, and browser recording permissions. 2 min read](https://missblue.dev/help/articles/troubleshoot-media) - [Contact Miss Blue support with a useful example Send enough context to investigate a problem while keeping credentials and unrelated customer data private. 2 min read](https://missblue.dev/help/articles/contact-support) ## Still need a hand? Send us your question, or text the team at (929) 272-7048. [Contact the team](https://missblue.dev/contact) [Text us](sms:+19292727048)