Overview
The connectivity and bandwidth requirements for Twilio's Javascript, iOS, and Android SDKs can vary depending on the version in use.
What You Need To Know
For a complete rundown of the connectivity needs for each SDK, see Voice SDKs Network Connectivity Requirements.
Note: For Twilio Programmable Video network requirements, see Programmable Video IP Addresses (Twilio Docs).
Conclusion
More information can be found in the following documents: