Please make sure that the following has been checked before inserting the SIM card to the PeTrack:
A. Did you activate your SIM card? Is the SIM card activated as unlocked prepaid GSM SIM card with talk, text and data service?
B. Did you put money on your SIM card and got the correct phone number from the SIM card carrier?
C. Did you install the correct SIM card size (15 x 25mm standard SIM)? (Refer to the photo below for the different sizes of SIM cards)
D. Is the SIM card installed properly, with contacts facing down towards PeTrack contacts?
For the steps on how to install the SIM card to the tracker, please click the link below.