# Samples and known issues

Source: [https://docs.qualcomm.com/doc/80-23889-1/topic/samples-and-known-issues.html](https://docs.qualcomm.com/doc/80-23889-1/topic/samples-and-known-issues.html)

This topic discusses the issues, regardless of the sample type (or types) on which they
            occur.

## Sample testing

Source: [https://docs.qualcomm.com/doc/80-23889-1/topic/samples-and-known-issues.html](https://docs.qualcomm.com/doc/80-23889-1/topic/samples-and-known-issues.html)

For device identification details, see [Table : Device identification details](https://docs.qualcomm.com/doc/80-23889-1/topic/mechanical-information.html#gsh1612798352300__table_hwg_5vl_bkb).

### Engineering samples (ES)

Source: [https://docs.qualcomm.com/doc/80-23889-1/topic/samples-and-known-issues.html](https://docs.qualcomm.com/doc/80-23889-1/topic/samples-and-known-issues.html)

These devices undergo limited testing and sometimes have significant feature limitations.
            They are suitable to assist with PCB development to conduct board-level electrical
            evaluation tests, and to explore manufacturing considerations. Do not use engineering
            samples for product-level qualification.

### Commercial samples (CS)

Source: [https://docs.qualcomm.com/doc/80-23889-1/topic/samples-and-known-issues.html](https://docs.qualcomm.com/doc/80-23889-1/topic/samples-and-known-issues.html)

These devices undergo full production-level testing, and meet the specifications and
            features described in the data sheet, except as otherwise noted in this document. They
            have passed device level qualification. Commercial samples are suitable for performance
            testing, and also for product level production and qualification.

## Known issues

Source: [https://docs.qualcomm.com/doc/80-23889-1/topic/samples-and-known-issues.html](https://docs.qualcomm.com/doc/80-23889-1/topic/samples-and-known-issues.html)

There are no known issues in the QCS6490 and QCS5430 chipsets.

Last Published: Sep 23, 2025

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