Need Android 5.1 Expert to get a SIM card for Brazil Network to work -- 2

Job ID: 35148594

Budget: $50 – $0 USD

We designed a M2M Device with Android Version 5.1.
I can change and add APNs.
Verizon and T-Mobile SIM work. 3rd party SIM that uses Verizon and T-Mobile work.
We’ve not been able to get a SIM for Brazilian network to work.
Unfortunately, the manufacturer went out of business, and we do not have the source code for the Android 5.1 operating system.
Need someone with who can figure out which settings to change in Android 5.1 and/or access all setting using an application like Android Studio or the tool of your choice to get the SIM to work.
Device uploads data to AWS and we use AWS to host all of our websites.
A speedy response would be welcomed.