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Frequently Asked Questions


Alerts are sent over a global cellular connection, so it needs a dataplan to work just as your phone has a cellular connection and dataplan, so does your sensor. The dataplans are affordable at about $4 per month. Mobile connectivity is more secure, global, and isn't easily hacked or unplugged like WIFI. Simtek has to pay a flat fee to carriers for each device and thus we can't bundle dataplan discounts. Email us to inquire about discounts on multiple sensors.

Insert the battery (there isn't an "On" button) and it will start monitoring any dark, and motionless space you place it in. Use in a safe, storage unit, or luggage for example. When there's an instrusion of either light or motion or vibration the sensor wakes up and finds the best cellular network available globally and automatically alerts your phone. Alerts take on average about 20 seconds to recieve after you trigger the device.

Need more info on operations that you don't see here? Head over to the SETUP and TROUBLESHOOTING pages for lots more info.

Simtek Sensors comes pre-installed with a special high performance global simcard that automatically connects to best available networks in over 200 countries with thousands of different carriers. For example in the USA your sensor might connect to T-Mobile or AT&T and in United Kingdom connect to Orange, or Israel Pelephone. In every country, there are many networks available for it to use automatically. No setup required on your part, even when travelling, insert the battery and it will work automically.

The Simtek Sensor is a battery powered, cellular based security sensor that does not need WiFi or external power. You won't find another security sensor with a full year of battery life, global range and setup in seconds that is this reliable and performant.Every year millions of people go without power for days and sometimes weeks due to different events. Would you want your defenses down when the power goes out due to an event or sabotage? That's the most important time to be on guard.

Where does the Simtek Sensor work?

We support nearly 200 countries. This list is not in alphabetical order. If you're unsure, please contact - United States, Canada, Afghanistan, Albania, Aland Islands (Finland), Anguilla, Antigua and Barbuda, Argentina, Armenia, Aruba, Australia, Austria, Azerbaijan, Bangladesh, Barbados, Belarus, Belgium, Belize, Benin, Bolivia, Brazil, British Virgin Islands, Brunei, Bulgaria, Burkina Faso, Burundi, Cayman Islands, Chile, China, Colombia, Congo Democratic Rep, Costa Rica, Croatia, Cyprus, Czech Republic, Denmark, Dominica, Ecuador, Egypt, El Salvador, Estonia, Faroe Islands (Denmark), Fiji, Finland, France, Georgia, Germany, Gibraltar, Greece, Greenland, Grenada, Guadeloupe, Guatemala, Guinea, Guyana, Haiti, Hong Kong, Hungary, Iceland, India, Indonesia, Iran, Ireland, Israel, Italy, Jamaica, Japan, Jordan, Kenya, Kuwait, Kyrgyzstan, Laos, Latvia, Liechtenstein, Lithuania, Luxembourg, Macau, Macedonia, Malaysia, Malta, Mexico, Moldova, Mongolia, Montenegro, Montserrat, Myanmar (Burma), Nauru, Nepal, Netherlands, Netherlands Antilles, New Zealand, Nicaragua, Nigeria, Norway, Oman, Pakistan, Panama, Papua New Guinea, Paraguay, Peru, Philippines, Poland, Portugal, Puerto Rico, Qatar, Republic of Korea, Romania, Russian Federation, Rwanda, Saint Kitts and Nevis, Saint Lucia, Saint Vincent, Samoa, San Marino, Saudi Arabia, Serbia, Singapore, Slovakia, Slovenia, South Africa, Spain, Sri Lanka, St. Lucia, St. Vincent and Grenadines, Suriname, Sweden, Switzerland, Taiwan, Tajikistan, Tanzania, Thailand, Trinidad and Tobago, Turkey, Turks and Caicos Islands, Tonga, Uganda, Ukraine, United Arab Emirates, United Kingdom, Uruguay, Uzbekistan, Vatican City, Venezuela, Zambia, Bermuda, Bosnia & Herzegovina, Cambodia, Cameroon, Canada, Chad, Republic of the Congo, Dominican Republic, Ghana, Honduras, Ivory Coast, Kazakhstan, Mali, Morocco, Senegal.

Worldwide UMTS/HSPA and GSM/GPRS/EDGE networks to provide true global coverage. The Simtek Sensor automatically connects to cellular networks on it's own (like a roaming mobile phone) and the Simtek Sensor II Second-Generation uses 4G connectivity.

Every Simtek Sensor requires a dataplan. Every sensor ships with a 30 day free trial. You can choose to pay annually or monthly at about $4 monthly per device. There are no contracts or cancellation fees, you may cancel at anytime by emailing After downloading the Simtek app on your phone, you are asked to pay for the dataplan when your free trial is up through the app. Note: each sense has NO LIMIT on the number of alerts or subscribers. Alert all you want to as many people.


Battery life is about a year with 10 alerts per month. Battery life depends on things like temperature (colder temps reduce battery life) and how often you use it in addition to other variables. We've seen battery life of 6-8 months with heavy use, around 30 alerts per month. The sensor sends low battery notifications and there's battery level information on the app to let you know when to recharge. Use the included Micro USB to recharge once every 6-12 months but BE PROACTIVE.

A passive infrared motion sensor (PIR), a light sensor, and for 2nd-gen the addition of an Accelerometer and Temperature plus Humidity sensor. The accelerometer detects movement of the device itself. If someone moves your safe or luggage but does not open it, the acceleorometer will trigger an alert. The PIR motion sensor detects infrared motion, like a human opening the safe or luggage. And the light sensor detects any visible light.

The Simtek Sensor will only trigger an alert when the sensors detect light, infrared motion or vibration movement. The only time we get reports of false positives, is when people drive on the highway with their sensor in the car and telecom and road traffic equipment can occasionally interfere.


Yes. The Simtek Sensor is designed to work in low signal environments, like your safe or basement. Cellular connectivity has higher performance in low signal environments than WIFI or Bluetooth. Have you ever sent a text msg SMS with barely any service? Every sensor includes an external antenna which we encourage you to use. String the external antenna outside the safe and hide it out the back. You can purchase the extender cable to hide the antenna 6 feet away from your safe.

No. It was engineered for poor signal environments, just like inside a thick metal safe. It only sends a very small amount of data with each alert, and works great in poor network conditions. We designed and engineered the Simtek Sensor to perform in these scenarios. As long as you're getting consistent alerts within 20-30 seconds.

The Simtek Sensor uses a special global simcard that connects to the best signal networks automatically, anywhere in the world. It has full coverage in over 200 countries, so this will be a rare scenario. In addition, the Simtek Sensor was specifically engineered for poor network environments. But in the rare event this happens, we will be happy to work with you to find a solution to your satisfaction.

About 20 seconds. The blue light indicates infrared motion detected. The red and green lights indicate the cellular modem activity. When the flashing red light "locks on" it has connected to the network and is pushing the alert to your phone. If the red link flashes constantly but never locks on and turns off, it wasn't able to find the network or there is a problem with the simcard. There is no LED indicator when light or acceleration movement is detected.


Download the app and scan the QR code on the battery cover. After inserting the battery and attaching the antenna, place the Simtek Sensor anywhere you want to monitor. Need more info on setup, please see SETUP for more information.

Follow the same setup steps, then swipe left or right to see your sensors in the app. Note: if you want another phone or family member to receive alerts, simply download the Simtek app on the second phone and scan the QR code and follow the same steps. There is no limit.

The Simtek Sensor is certified by FCC and CE and is safe for all ages. All data is securely stored on private servers in the United States, with strong encryption and privacy. All alert transmissions are encrypted over private cellular networks and secure. Simtek takes privacy and security seriously, and your data is never sold or given to third parties. There is no audio or photo or video recording capability on the Simtek Sensor. Simtek does not know (or care) what our customers monitor. We help you protect what you love.


Subscribing multiple people to receive alerts is easy. They simply download the app on their phone, and go through the same setup you did. Note: the original user will get a subscriber notification warning them other people have synced to their device to recieve alerts. Also note: adding and removal of subscribers can only be from each phone. You cannot add or remove anyone from your phone, only yourself for security reasons.

Low battery alerts are pushed to you automatically when the battery is low telling you to recharge. Recharing the battery should take a couple hours, wait until the yellow charge light goes off.

Easy. Simply unplug the wired antenna! That's it. Each sensor has an onboard antenna that you can't see. It's not as powerful as the wired antenna, but it should still get the job done. We have many more features that we hope you'll discover. We're always improving the experience and adding new things. Currently, there are several hidden or not so well known features about the device and app that we hope you'll discover and enjoy!


We have worked very hard to create a product you will love and we believe you will love your Simtek product. However, we realize the Product you receive from Simtek may not be exactly what you expected. Should this rare occurrence take place, the original purchaser of the product may return all Simteks purchased in the original transaction, in their original condition, with the original receipt and packaging, within 30 days of the date of delivery to the original retail purchaser and Simtek will exchange it or provide a full refund of the original purchase price at Simtek Inc.’s sole discretion. We may first try to remedy the situation by repairing, replacing or otherwise making good on our goal of delivering exceptional products. Please note that this policy applies only to Products you purchase directly from Simtek. Note: a restocking fee and/or other fees may apply. Refunds are made on a case by case basis, and returned to the original form of payment. This is in addition to your legal rights and your rights under the Simtek hardware one (1) year Worldwide Warranty referred to above. All returns must be authorized. To authorize a return, please email

Simtek warrants that your Simtek Sensor will be free from defects in materials and workmanship for a period of one (1) year from the date of delivery to the original purchaser or retail purchaser.