Questions re: OpenSSL Client Compatibility Changes for Let’s Encrypt Certificates

[Nummer378]

If old client compatibility is your highest concern, another CA is probably your best option.

@nummer378.de

ZeroSSL chains up to Sectigo, they use a root certificate from 2004 (in most trust stores since 2005).

As Android 4.0+ is ~2012+, they should work fine with Sectigo's roots.