Smart watches and mobile phone App pairing, do not receive the verification code?

Answer: must first confirm the following points:
(1) SIM card device signal is normal.
(2) if SIM is normal, whether you can receive text messages, the Internet is normal.
(3) whether the equipment with built-in IMEI and packing box on the label IMEI number.
If the above products are normal, please contact customer service staff.