The CID register is 16 bytes long and contains a unique card identification number. It is programmed during card manufacturing and cannot be changed by SD Card hosts. The CID number is a compilation of information about the card, such as manufacturer, date manufactured, checksum total, GB size and more.This is accomplished by sending a command CMD26 PROGRAM_CID Programming of the card identification register. This command shall be issued only once. The card contains hardware to prevent this operation after the first programming. Normally this command is reserved for the manufacturer.

1, Are you manufacturer?
Yes, EDO are professional factory on SD & Micro Memory cards for 10 years.
You will get professional service from EDO .

2, What certificates do you have?
CE, ROHS and FCC. Country of Origin/CO.

3, Can you put my brand name (logo) on SD CID Memory cards?
Yes, of course. OEM service is the most important part in our business.

4. Can you upload map into the SD CID Memory card?
Yes , we can upload map into the Memory card.

5. What is the brand of your flash chip?
EDO usually use original chip. We promise all the chip are full capacity, EDO do not offer fake/upgraded chip.

6.What is the lead time of the Change Custom CID SD card?
Normally 1 day (depend on different quantities & Requirement).

7 How you ship the goods ,and how long does it take?
 usually ship by DHL,UPS,TNT,FEDEX, alibaba express, it always take 2-5 days to you.
To Russian, we cooperate the fastest agent, 5-10 days. (Moscow always 5 days.)
To UK, fatest 1-3 days.