TE-A Ordering Codes

Could you please explain the difference between these two parts?

RG525FNAEA-M20-TA0AA
RG525FNAEB-E68-TA0AA

Is VOLTE enabled on either of the above parts?

Also, if possible, is there a way to decode these in the future? I see it is common for 5 digits to change. What is the EA- vs EB-, and what is the meaning of M20, M28, E68?

Thank you.

Could someone please assist?

Dear @WorkerBee25
These modules support volte, please confirm your SIM card also support this.

The fuction of EA- vs EB- are roughly the same, only MCP size is different.

RG525FNAEB-E68-TA0AA is pending now, if you want to test, please use RG525FNAEA-M20-TA0AA.