Please noted:
Only support GSM Micro sim card, which supports with data and voice plan. Does not support AT&T,Verizon, joltmobile or Sprint.
Recommend the cards below: Speedtalk, T-mobile prepaid complete SIM starter kit sim card.(works only with “pre-paid “plan, do not work with “play as you go “plan)
You can search “GSM sim card” on amazon to choose the carrier you want. Price is about 2-10USD

How to work
1)insert an active sim card to the cable, keep cable connect with any power.
2)And wait about 10 seconds
4) for voice callback: text “1111”message to the sim card’s phone number, it will open voice callback function.if the surrounding voice is louder than 45db, it will callback automatically.You can hear the voice around the cable. if cancel, text “0000” message to the card.
5) for GPS location : text “DW” message to the sim card’s phone number.
6) Cable compatible with; iPhone 7/7 Plus/6/6 Plus/6S/ 6S Plus, SE/5S/5,iPad,iPod Nano

Attention:
1.This cable does not have waterproof function
2.Do not install the cable into the signal weak place
3.Make a phone call or re-plug the card to make sure the power supply powered properly.
4.Please check whether the SIM card out of charge, or message is full. If so, please empty them and test again.

Product Features

• ✔ SPY VOICE LISTENING DEVICES – automatically callback when the surrounding is louder than 45db. You can hear the communication around the cable by calling the sim phone number which is setting well beforehand
• ✔PORTABLE GPS LOCATION TRACKER – real time GPS GPRS tracking and monitoring system for vehicles,luggage,spouses,elderly,kids,smart phone,bags or anything else
• ✔ HIDDEN USB CABLE – same appearance like other ordinary cable. It is very secret and not easy to be found. Compact size to go anywhere, like put it into car/luggage/handbag. Text message to the sim card in the cable and get precision GPS location by phone
• ✔ EASY TO USE – only take 10 seconds to insert the activated SIM card into cable,keep the cable connect with external power like car charger, power bank,power adapter. Then start to track anything as you want
• ✔ CABLE WORKING FREQUENCY – 850Mhz/900Mhz/1800Mhz/1900Mhz(Quad-Band).Recommend: Speed talk, T-Mobile Prepaid Complete Micro SIM Card. (No monthly fee)