# Mangoh yellow, esim and octave
**URL:** https://mangoh.discourse.group/t/mangoh-yellow-esim-and-octave/6253
**Category:** mangOH Yellow
**Created:** [March 2, 2021, 4:41pm UTC](https://mangoh.discourse.group/t/mangoh-yellow-esim-and-octave/6253 "2021-03-02T16:41:47Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@epastor](https://mangoh.discourse.group/u/epastor)
#### Post date: [March 2, 2021, 4:41pm UTC](https://mangoh.discourse.group/t/mangoh-yellow-esim-and-octave/6253/1 "2021-03-02T16:41:47Z")
Hi all,
I’m trying to retake with the mangoh yellow witch we left aside for some time now.
I have the boards provided in the last Paris event, which were connected through octave.
My questions are:
- Which firmware do I need to load if I don’t plan to use octave.
- Can I use the esim to connect to the internet, or it is just valid for octave?
- If I like to load an external sim, which changes are required in the configuration?
- Can I use a mangoh red sim with the mangoh yellow?
Thanks a lot.
Keep safe.
---
### Author:  [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [March 2, 2021, 4:44pm UTC](https://mangoh.discourse.group/t/mangoh-yellow-esim-and-octave/6253/2 "2021-03-02T16:44:43Z")
You can get the fw here
[https://mangoh.io/mangoh-yellow-resources-software](https://mangoh.io/mangoh-yellow-resources-software)
To use external sim card with different apn, you can see here:
> [@APN will recover when mangOH Yellow reboot](https://mangoh.discourse.group/t/apn-will-recover-when-mangoh-yellow-reboot/4830/11):
>
> If you are using Windows 10, be aware that it may configure the APN if it is permitted to manage the connection.