TK207 can handle 2G or 3G gsm sim card from att or tmobile or any gsm carrier who has 2g or 3g service


we suggest you buy tmobile sim card since it has both 2g and 3g , att only have 3g network for data plan


but if you only need sms ping mode to track the gps tracker. att or tmobile is just fine, only need voice plan

2g and 3g are referred to as data plan requirement.


you can now buy our own branded sim card, the plan is start with $9 and no contract, no cancellation fee, no auto-renew required.

Edited by user Monday, August 14, 2017 8:01:48 PM(UTC)  | Reason: Not specified

if you only use for model TK102
please only use Tmobile or its reseller branded sim card (such as H2O wireless)
since ATT changed its voice channel tech to 3G tech as well, it wont work even for voice.

if you use our 3G TK207,
you can buy att or tmobile and their reseller's brands



refer to the attached,

if you have 6 pin nano sim card, or all-in-one sim card with holder (not 8-pin standard sim card).

you need take out the sim card ,and put like this, please note, left gps two contacts will not be used.


and always test it , very simple, if the dim green light goes off, then the sim card is correctly installed