Color:Black 3 in 1 LONG CZ J8 The Smallest Bluetooth Phone, 99.99% Plastic Boss Phone! 1. Only 18 grams - One finger size Dimensions: 68mm x 23mm x 11mm. 2. Removable ear clip to use as normal phone or Bluetooth Head Set 3. Support GSM iPhone 4 Mini SIM Card Micro, support 2G GSM850 / 900/1800 / 1900mhz ONLY, CDMA or other netowrk can not support, if your SIM card is 4G but 2G network does not stop then can also use , but in this phone it only uses the 2G function. 4. USA buyer, AT&T card can not support, pls note! Some countries have areas may stock GSM 2G function, check your SIM network before purchase.UK a SIM card can not use, but with "E" Logo can be used. 5. Please insert the SIM card correctly according to the picture instructions or manual instructions. If the SIM card is not inserted correctly, the phone will not recognize the SIM card. If the card is not removed properly, try using a needle to extract it. Remarks / Warming up: 1. Pls choose and set the equal volume. 2. You warm up and record your audition. 3. The use of high volume will be dangeraous for your hearing. 4. Pls put the SIM card when the J8 turns off. Turn on the SIM card. 5. Make sure the correct SIM card and the operating method on the right. 6. Check the operating image of the SIM card.