3G-only Teslas to lose connectivity due to AT&T. What you can do

October 18, 2021

By Nuno Cristovao

First, we have to start off with the positive here, as this isn't Tesla deprecating older vehicles. It's due to AT&T turning off their 3G network, which Tesla uses.

Huge props to Tesla for maintaining cars for so long. Unlike many other tech companies, they don't add vehicles to a vintage or obsolete list. Tesla still delivers updates to the original 2012 Model S cars today. For free. 9 years later.

Early Tesla vehicles to lose cell connectivity

And support isn't ending yet. Tesla will continue to support these vehicles with software updates over WiFi.

There's no other manufacturer on Earth that would do that. We as consumers are always pushed to the newest models. Not always because of hardware advancements, but because manufacturers often only make new features available on new models.

The reason some older Teslas are losing cellular connectivity isn't any fault of Tesla's. It's a matter of technology just moving on. In the US, all Teslas connect to AT&T's cellular network. It has been this way since the original 2012 Model S. Back then 3G provided some of the fastest speeds over cellular and most cellular connected devices used 3G modems, including the modem in early Teslas.

Unfortunately, starting in February next year, AT&T is turning off their 3G service across the country. Cellular data will only be available on LTE and 5G.

This problem isn't unique to Tesla. Any device unitizing AT&T's 3G network will fail to connect come next year. This includes other devices like older cell phones and cellular iPads.

An always available data connection is one of the big reasons Teslas are popular and exciting. You can stream music, browse the web, turn on your climate remotely and receive real-time traffic. It'll even notify you if any doors or windows are left open. So when this connection goes away, it does take away part of the appeal the car initially had.

Luckily for owners, Tesla is giving owners plenty of options here, some free, some not so free, but a good value nonetheless.

Connect Via WiFi

First, your car will not be obsolete, Tesla will continue to provide updates to your vehicle. The cellular modem may be outdated and unable to connect, but your car will still be able to connect via WiFi to your local network.

All the functions your car was able to perform over it's cellular network will still be able over Wi-Fi, which includes downloading software updates. Of course, WiFi doesn't do you much good if you want to stream music while driving.

Connect Via Hotspot

With software update 2020.48.37.8, Tesla added some new capabilities to help with this transition and give owners more choice. Teslas normally turn off WiFi once you shift into Drive or Reverse, since it's no longer needed. However, with this update, Tesla introduced 'Remain Connected to Wi-Fi in Drive', a mouthful of a name, but a great feature. This allows your car to keep WiFi on after shifting into Drive. This will allow owners to share their phone's data connection with the car via a hotspot.

Using a hotspot connection will give your Tesla the same capabilities it had when connecting over a cellular network since these cars have a lifetime subscription to Tesla's Premium Connectivity package. Even though you'll be using a hotspot to connect, you'll remain with access to satellite-view and traffic visualization, which is normally not available when using a hotspot (when you're not subscribed to Tesla's Premium Connectivity).

Modem Replacement

Since it's only the cellular modem that is outdated, Tesla will be offering an option to get it replaced with a LTE and presumably 5G capable modem, giving your car many more years of a cellular connection, which is likely to outlast the car.

Tesla will be offering the cellular modem replacement for a very reasonable fee of $200 in the US.

Upgrading MCU

Lastly, there is another option that Tesla is offering that will give you more than just a modern modem. You'll be able to upgrade the MCU in the vehicle and not only upgrade the cellular modem, but also the WiFi chip, and the processor that powers the media center.

At this point, technology has evolved quite a bit and using the touch screen on a MCU 1 vehicle has become quite slow. Upgrading the MCU will provide a much better experience on par with the latest Model 3 and Model Y vehicles.

Upgrading to MCU 2 will also bring a slew of new features that haven't been available in MCU 1 vehicles because of its limited processing power. Adding the MCU 2 introduces features such as Tesla theater, many games such as Sky Force Reloaded and Cuphead, improved driving visualizations, Tesla Caraoke, an improved web browser and more.

The price of upgrading your MCU is quite a bit more expensive, but you do get a whole lot more as well. Although all the new features are nice, the biggest is the improved performance and responsiveness of the touch screen.

The cost to upgrade the MCU to MCU 2 is $2,000, which includes parts and labor.

Which Cars are Affected?

Only vehicles equipped with a cellular modem that is only capable of a 3G connection are affected. If your vehicle has an LTE or LTE and 5G modem, then you remain unaffected. Tesla used 3G-only modems up until 2015.

If your Tesla was built before June 2015 and you haven't upgraded your MCU, then you may be affected. You can reach out to your local service center to confirm whether AT&T's decision to disable its 3G network will affect your vehicle.

View Your Cellular Modem

In update 2020.48.37.8 Tesla is also displaying additional information about your car's modem to you. If you navigate to Controls > Software and tap 'Additional Vehicle Information', your car will now display what kind of modem your car has installed and which cellular networks it's able to connect to.

We hope this will be a feature that will be rolled out to other vehicles as well. Some vehicles feature LTE only modems, while others contain 5G modems as well. Letting owners know which modem is in their vehicle and which networks it can connect to is a worthwhile addition.

Tesla Accelerates India Entry: Eyes Gigafactory India

May 15, 2025

By Karan Singh

Not a Tesla App

Tesla’s much-anticipated official entry into the Indian market appears to be shifting to a higher gear, with recent reports from Business Standard (paywall) indicating that Tesla is now looking into establishing Gigafactory India. Business Standard points to Tesla exploring land options in Satara, Maharashtra.

Satara is about 250km (155 mi) from the Port of Mumbai, placing it in an excellent location to easily receive parts and materials from other countries, as well as ship completed vehicles elsewhere around the world. The potential facility is reportedly planned as a “Completely Knocked Down” or CKD assembly plant, which means that Tesla would import parts and then assemble them locally.

This is key to Tesla’s strategy in addressing India’s traditionally high import tariffs on fully built vehicles, which have been a major hurdle for Tesla in the past. This push aligns with India’s updated EV policy, which calls for reduced import duties on EVs priced at $35,000 USD or above for companies that commit to investing at least $500m USD in local manufacturing facilities between 2024 and 2027.

According to the report, Tesla is prepared to invest substantially more, with figures around $2-3 billion USD cited for a plant capable of doing final assembly on up to 500,000 vehicles. Tesla supposedly aims to roll out the first locally assembled vehicle from the facility no later than March 2026.

Building the Indian Foundation

Beyond just manufacturing plans, Tesla has been actively laying the groundwork for its future Indian operations. Tesla has reportedly finalized leases for its first showrooms in Mumbai and Delhi - two of the largest cities in India. An office space in Mumbai to headquarter Indian operations is also on that leasing list.

Tesla has also begun to hire its initial tranche of employees, with over 30 positions already posted. Tesla is also hiring Autopilot Vehicle Operators in several locations, indicating that Tesla intends to test at least the FSD suite in one of the most complex traffic situations around the world.

Elon Musk also confirmed that he plans to visit India and speak to the Indian Prime Minister, likely to broker a deal focusing on building out Tesla’s presence and bringing new technology to the country.

The road to India has not been without its complexities. Reports confirmed the resignation of Prashanth Menon, Tesla's India head, with oversight of Indian operations temporarily shifting to Tesla's China team. Furthermore, earlier discussions with potential joint venture partners, such as Hyderabad-based Megha Engineering for land acquisition, reportedly did not materialize, leading Tesla to explore other avenues and locations like Satara.

Despite all the setbacks, Tesla’s efforts indicate that they are more determined than ever to make a formal and official entry into the Indian market.

Tesla's Spring Update Tear Down: New Grok Code, Ridesharing Features and More

May 15, 2025

By Karan Singh

Not a Tesla App

Tesla’s software updates often contain far more than the release notes show, whether they’re undocumented features or preparation for the next big thing. The 2025 Spring Update is no exception - it’s filled with undocumented changes and, of course, new, inaccessible code that points to upcoming features.

Tesla hacker greentheonly on X has been digging into update 2025.14 and found some intriguing additions and hints about what’s coming next, so let’s take a look.

Grok Incoming

New hidden UI elements have been found pointing towards the integration of a Grok-powered smart assistant for Teslas. This includes references to a “personality” button, just like the Grok app. Tesla is likely hard at work on an advanced conversational AI and integrating the ability to control your vehicle.

Grok is the smart assistant that’s expected to replace the ancient voice commands that are available today. However, expect anything beyond vehicle commands to require Tesla’s Premium Connectivity.

While none of these new elements are active just yet, it is a good indication that it is likely on its way quite soon.

Siren Detection UI Removed

Code related to user-facing elements for siren detection has now been removed. We’ve confirmed that the orange dot is still in place with the Spring Update, but elements related to future changes and a UI for siren detection have since been removed from the code base.

Removals don’t indicate much - Tesla could be refactoring the code while they’re working on this or have changed directions on how to implement a future.

Insights into the New Dashcam Viewer

More significantly, for users on HW3, Green reported that the newly improved Dashcam Viewer isn’t just an improved version of the video viewer, but it was built from the ground up, and it’s now web-based. This technical detail explains why the updated viewer is only rolling out to AMD Ryzen vehicles and not older, Intel-based vehicles. HTML-based apps are often quicker to develop but usually require more resources to perform smoothly, which may be why we’re seeing the Ryzen infotainment system requirement.

This likely means that the new Dashcam Viewer won’t arrive on Intel vehicles in a future update unless Tesla can optimize the viewer enough to perform adequately on the older hardware.

HW3 vehicles already missed out on the new B-pillar recording feature. While Green thinks it’s technically possible to bring this feature to HW3 cars, unknown technical issues are likely preventing it. Older HW3 vehicles without a USB port in the glovebox only include USB 2 ports, limiting bandwidth, which could be one of the reasons, among others.

New Key Types

Perhaps a hint at Tesla’s third-party Robotaxi fleet ambitions, Tesla is building out new types of keys.

Rider Keys: These new keys appear to be designed to allow designated riders to access vehicles that are operating in “fleet mode.” This functionality sounds very much like what will be needed to allow Robotaxi customers to access a vehicle temporarily while they’re being given a ride.

Pre-Delivery Keys: Another new key type found is “pre-delivery.” While we don’t have an exact purpose nailed down quite yet, we’re assuming this could potentially allow new owners limited access to their vehicles for inspection prior to officially accepting delivery.

That’s plenty of interesting stuff found in the 2025 Spring Update - and we’re excited to see even more in just a few short weeks once Tesla launches their Robotaxi network in Austin.