Identifying iPhone 3g's Manufacturer Date Release (Bootroom Check)

To check iPhone manufacturing date you just need to know the serial number of iPhone. Lets see how to check iphone serial number first and then how the serial numbers tells you the manufacturing date of iPhone. Using this guide you can find manufacture date of iPhone 2G, 3G and 3GS.

How to check iPhone Manufacture date: (iPhone 2G, iPhone 3G, iPhone 3GS)

• Tap on “Settings” icon > General > About.
• Here you will find serial number of you iPhone as show below in screenshots.

> As you can see the 3rd, 4th and 5fth serial is 136, it means (1) signifies year of 2011 and (36) is the 36 weeks of 1 year. In short this kind of serial is risky to update the baseband to avoid corrupted iccid, imie, bluetooth and wifi. So if you incountered iphone 3gs with serial starts to xx109xxxxxx, aware to update baseband to 6.15 because this is called as new bootroom.

> And this another one signify that this is an old release manifacturer date which is called as Old Bootrom > it is safe to update baseband or enable to downgrade as much as possible. Check the serial # to find out the year and week's manufacturer date. It show's (925) the 3rd, 4th and 5fth digit. (9) is the year of 2009 and 25 is the (25) weeks of 1year.

Hopoly this guide will help you a little bit to identifying the bootroom or manufacturer date to avoid updating or downgrading your iphone especially in 3gs.

Small tip's: If your iPhone 3gs (8gb mostly) with the 3rd serial digit starts to 1 > may i advice to not let go for updating/fetching baseband to 6.15.