Hi,I have heard that someone failed to access internet after OTA-Update.He contacted us and help us figure out what is going wrong on his watch.Thanks for his feedback,we have solved this issue.The watch has lost IMEI number that’s why it can’t access internet. Here I want to make a tutorial about how to write IMEI. First,download the SN-Writer tool.https://drive.google.com/open?id=0B4Ay_s354RncOGRyQUxObDk1LXc Second,extract the file,find the SN Writer.exe,open it.   Third,Click the System Config. Fourth,Tick up the IMEI,browse your watch firmware folder,select the file.You can download here.https://chinawatchs.com/Download.html Fifth,Click Start,enter the IMEI writing interface. Sixth,Write your IMEI number,SHUT DOWN your watch,connect to pc.Make sure your watch is shutdown and has enough battery life. Seventh,Wait the writing process.If the writing interface shows up,keep writing,until the PASS shows up. If you have any questions,keep in feedback. Thanks.