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iPhone 3GS

If you ever find that you need to upgrade or replace your SIM card for your iPhone 3GS, you’ll be glad to know it’s not hard to do, and easier to save hundreds per year by switching to SpeedTalk Mobile.

IPhone 3GS Speedtalk Mobile


3.5-inch multi-touch. GPU: PowerVR SGX (Supports OpenGL ES 2.0). Max Resolution: 480 x 320

Operating System

Minimum OS: iPhone OS 3.0. Maximum OS: iOS 6.1.6.


8GB, 16GB, 32GB. (Subject to availability)

Front Camera


Rear Camera5x digital zoom
  • Processor: Samsung S5PC100 (ARM Cortex A8 core).
  • CPU Speed: 600 MHz.
  • FPU: integrated.
  • Bus Speed: 150 MHz.
  • Register Width: 32-bit.
  • Data Bus Width: 32-bit.
  • Address Bus Width: 32-bit.
  • Onboard RAM: 256 MB (non upgradeable).
  • Storage capacity: 8GB, 16GB, 32GB.
  • Flash Drive: 16/32 GB.
  • OS: Minimum OS: iPhone OS 3.0. Maximum OS: iOS 6.1.6.
  • Display: 3.5-inch multi-touch. GPU: PowerVR SGX (Supports OpenGL ES 2.0). Max Resolution: 480 x 320.
  • Video Out: composite, component (via Dock Connector).
  • Camera: 3.15MP.
  • Input/Output: USB via Dock Connector.
  • Audio Out: stereo 16 bit mini.
  • Speaker: mono.
  • Microphone: mono.
  • Sensors: Accelerometer, Proximity sensor, Ambient light sensor.
  • Connectivity: Wi-Fi: 802.11b/g. Bluetooth: 2.1+EDR. Cellular: GSM/EDGE (850, 900, 1800, 1900 MHz). UMTS/HSDPA (3.6 & 7.2 Mbps) (850, 1900, 2100 MHz).
  • Location: GPS, Digital Compass.
  • Battery Life: Talk 5 hrs (3G)/12 hrs (EDGE). Standby 300 hrs. Internet 5 hrs (3G)/9 hrs (Wi-Fi). Video 10 hrs. Audio 30 hrs.
  • Colors: Black and white.
  • Dimensions: 4.5-inch H x 2.4-inch W x 0.48-inch D.
  • Weight: 0.29 lbs.
Model NumberA1325, A1303
(on the back cover)
ReleasedJune 2009
Display Size3.5 inches
Dimensions115.5 x 62.1 x 12.3 mm (4.55 x 2.44 x 0.48 in)
Weight135 g (4.76 oz)
Capacity8/16/32GB, 256MB RAM
ColorsBlack, White
Front PanelFlat and made of glass
Back PanelThe back housing is made of plastic. The imprint on the back of the phone is less shiny than the Apple logo above it.
SIM trayOn the top side that holds a “second form factor” (2FF) mini-SIM
Serial NumberPrinted on the SIM tray
IMEI/MEID+ You will find it in the Settings menu
  • The iPhone 3GS included both specification and feature enhancements over its predecessor, the successful iPhone 3G. The 3GS included a higher-resolution video-capable camera, an integrated Magnetometer, and Voice Control, VoiceOver, integrated Nike + iPod support, and an inline remote on the headphone cable.
  • It shipped with iPhone OS 3.0, which included software enhancements, such as cut & paste, pervasive landscape keyboard, search, internet tethering, and a voice memos application.
  • The display features a capacitive touchscreen, which is designed for a bare finger or multiple fingers for multi-touch sensing. Besides, improvements over its predecessor’s screen include 24-bit color emulation (18-bit color display plus dithering) for a more color rich display and oleophobic coating to help reduce fingerprints on the display. The capacitive touchscreen is designed for a bare finger, or multiple fingers for multi-touch sensing.
  • Phil Schiller, the senior vice president of worldwide marketing at Apple, said in the launch note at the WWDC that in 3GS “S” stood for Speed.
  •  The iPhone 3GS was the first iOS device to receive updates for four major iOS releases. However, this model didn’t support some major features of iOS 6.
  • The support for 7.2 Mbit/s HSDPA downloading remained limited to 384 kbps uploading as Apple had not implemented the HSUPA protocol).
  • The reverse of the iPhone 3GS is almost identical to that of the 3G, except for the reflective silver text which matches the silver Apple logo on the iPhone 3GS, replacing the 3G’s grey text.
  • The iPhone 3GS was released in Australia and Japan on June 26, and internationally in July and August 2009. Following the release of the iPhone 3GS model, the iPhone 3G price was cut in half.
  • This 3GS was succeeded as Apple’s flagship smartphone in 2010 by the iPhone 4, but it continued in production until September 2012 with the announcement of the iPhone 5.
  • The 3GS LCD display was designed made by LG (but designed by Apple).
  • The iPhone 3GS’s camera app features a slider which allows to switch between capturing photos and recording videos
  • A tap-to-focus feature allows users to tap on an area of the camera image to auto-focus on, 5x digital zoom (iOS 4 or later), auto focus and auto exposure lock when holding an area down (iOS 5 or later), and gridlines for composition (iOS 5 or later).
  • The 3GS was the first smartphone ever with a system-on-a-chip, which was composed of an ARM Cortex-A8 CPU core underclocked to 600 MHz (from 833 MHz), integrated with a PowerVR SGX 535 GPU.
  • On September 9, 2009, Apple launched an updated model that patched a segment overflow in the SecureROM that had allowed loading an unsigned LLB.
  • Users reported overheating of this model while in heavy use. Some others reported discoloration of the white models due to heat. Apple responded to the heat issue reports by warning users against leaving the device a car on a hot day, leaving it in direct sunlight for extended periods of time, and refraining from heavy usage while in a hot/sunny environment.

Apple Order Numbers:

  • MC555LL/A – 8 GB configuration, (only available in black)
  • MB715LL/A – 16GB configuration in black
  • MB716LL/A – 16GB configuration in white
  • MB717LL/A 32GB in black
  • MB718LL/A – 32GB in white.


  • 16GB and 32GB version on June 7, 2010
  • 8GB version on September 12, 2012.


Black and white (Subject to availability)


0.48 in.+/-


2.4 in.


 4.76 oz.


4.55 in.


1, 2, 3, 4, 5, 7, 12, 13, 20, 48, 66

5G Nationwide


5G Ultra Wideband


World Device

Works in over 200 countries depending on your plan.




A1325, A1303

Global & Roaming Network

GSM/EDGE (850, 900, 1800, 1900 MHz). UMTS/HSDPA (3.6 & 7.2 Mbps) (850, 1900, 2100 MHz)

Are You Overpaying For
iPhone 3GS Service?

SpeedTalk Mobile offers the most competitive Top Value Unlimited wireless service. Renewable prepaid plans for cell phones, smartwatches, GPS trackers, and more.

No Contracts, No Credit Checks, and 100% money-back guaranteed. 

We Guarantee That You Will Love All The Savings
Or Your Money Back!

No Contracts! No Credit Checks! No Commitments!  

If You Are Not 100% Satisfied With Saving Hundreds Per Year,

You Can Cancel At Any Time With Our Guarantee. 

Terms And Conditions

Why Make The switch?

Monthly Bills
$ 1

The cost per month of the average American’s cellphone bill for a single line.

Percentage of consumers
1 %

Percentage of U.S.A. mobile consumers overpay for unlimited data wireless plans.

average you can save
$ 1

The National average amount you could save by switching to SpeedTalk Mobile Wireless.

Why Choose Us

Dependable Wireless, And Affordable Service! SpeedTalk Mobile®


You get premium wireless service on the nation’s largest 4G / 5G network, for less than what big wireless companies charge.


Choose the monthly usage amount. That is right! If you are not using it, you can switch to a lower plan at anytime.


Your unlocked device and current phone number are always welcome at SpeedTalk Mobile®


There is never any contracts or commitments. Start and continue service when you want.

SpeedTalk offers the most competitive subscription wireless service. Renewable prepaid plans for cell phones, smartwatches, GPS trackers, and more. No contract, no credit checks, and 100% money-back guaranteed. 

Coverage You Can Count On

Check the coverage in your area


The following phones work with our service


iPhone – All models –

All 4G LTE GSM phones

All phones purchased through T-mobile

All phones purchased through AT&T, but they have to be unlocked – Only 6 and newer phones purchased through Verizon & Sprint.


Android – All models –

All 4G LTE GSM phones

All phones purchased through T-mobile

All phones purchased through AT&T but they have to be unlocked – Only 2016 and newer phones purchased through Verizon & Sprint.


Windows – Most windows phones.


Non-smartphones – All models –

All 4G LTE GSMUnlocked


Other – All models –

All 4G LTE GSMUnlocked

The transfer process will take part once you have received a SIM card in the mail from SpeedTalk and ready to activate your service with us. We will ask you for your account # and password from your current carrier. Phone number must be active with the current carrier to ensure the transfer of your number to SpeedTalk network.

Keep in mind that there are exceptions to this rule, but it will never be because of SpeedTalk. Your phone will have to be in good standing with your current or past carrier. You will also have to purchase one of our plans first and you should start the transfer process with SpeedTalk prior to your cancellation with your current carrier. It’s very important that you do not cancel your account with your current carrier before the transferring process is completed.


If you currently do not have a phone number. SpeedTalk will generate one for you automatically, you just need to provide a zip code so we can issue a phone number based on that zip code. (It’s important to enter the zip code of the area where you will regularly use your device)

Yes, you can. We are a combination of subscription and pre-paid plans.

We are a 100% money back guaranteed service. However, if you have consumed more than 30 minutes, 30 texts, or 30mbs of data within 14 days of the plan cycle, your purchase will be considered buyer’s remorse and you will no longer qualify for a refund.

A SIM card is an integrated circuit intended to securely store the international mobile subscriber identity number and its related key, which are used to identify and authenticate subscribers on mobile telephony devices

a SIM (Subscriber Identity Module) card is a tiny, portable memory chip that stores information about you as a cell phone user. On it, there’s a seventeen-digit code that designates its country code of origin, the system carrier (such as AT&T or Verizon), and a unique user ID.

You may wonder, “Who cares about this code? A valid question and guess what: phone carriers do. It’s how they attribute cell phone bills and charge us.

Above all else, SIM cards are super handy because they can be easily transferred from one device to another. Just like in my opening story, all that you’d need to do is take it out of one phone and slip it into the new one. By making the switch, most (if not all) of your contacts and personal settings will transfer with it, making life all the easier.

SIM cards were introduced all the way back in 1991. The first SIM card was about the size of a credit card. Since then, there have been several updates and iterations, making them smaller and smaller.

This evolution closely aligns with the history of the GSM (Global System of Mobile Communications) mobile network. Developed to describe protocols for second generation (2G) (3G) (4G) AND (5G) cellular networks, the GSM today stands as the default global standard for mobile communications.

SIM cards are a crucial part of GSM networks, storing user information required for authentication. Ultimately, this allows both your phone to connect with a GSM network and GSM networks to track your phone usage (specifically, your minutes, texts, data usage, etc), giving carriers the information to send you an accurate phone bill.

GSM is the standard network in America, Europe, Asia, Africa, and most other places. Interestingly, besides GSM, the United States has an additional network called CDMA (Code Division Multiple Access) that is used by carriers such as Verizon and Sprint. Phones on the GSM or CDMA network can use any carrier’s network, lowering the costs for the carriers and its users.

When it comes to your phone’s connection with either network, SIM cards are essentially the brain of your device.

A SIM Card is a chip that all devices carry. The chip that communicates with our network.

There are three basic sizes of SIM card: the standard, the micro, nano.

Of the 3, the Standard is the original SIM and the largest. Today, these are mainly used on older phones.

The Micro SIM card is essentially a standard SIM card with the extra plastic around the circuit board trimmed off.

A trimmed version of the Micro, the Nano is the smallest and used on today’s iPhones. Although minuscule compared to prior versions, the Nano still holds the same amount of data as earlier SIM cards.


When skimming the evolution of the SIM card, you likely noticed that they’ve become much smaller. But prior to the launch of the iPhone 4 in 2010, we really only had one SIM card size. Introduced in ‘96, it was the standard used in every phone and it made the GSM folks happy. Essentially, it was your entire phone on a card. It made things simple. If you wanted a new phone, all you’d need to do was take that SIM out, pop it into any phone and suddenly your phone number would be transferred to the new device. For over a decade, this was the standard, which made switching phones a breeze. Now? Not so much.


Enter Apple. Wanting to save precious room for its newest generation of smartphones, Apple switched from using the standard Mini-SIM to the Micro-SIM once the iPhone 4 hit shelves.

Surprisingly, the Micro-SIM wasn’t some new flashy SIM developed for the latest iPhone. Believe it or not, it was first introduced in 2003.

Back then, its purpose was clear: if a device was too small to fit a mini-SIM, you’d have to use the micro-SIM. In addition, the micro-SIM was designed for backward compatibility, meaning it can work with input generated by an older version of the SIM (such as the Mini-SIM).

In addition, despite its smaller size, the micro’s performance wasn’t impacted at all, as chip’s contact area remained the same. It turned out to be scaled down – the card only needed its excess plastic to be cut from it.

When Apple released the iPhone 4 with the micro-SIM, it became the standard for most smartphones. Samsung, Nokia, and HTC are just a few of the manufacturers that adopted the new Micro-SIM. During this time, several upgrading to the iPhone 4 opted to use an adapter to get their SIM cards cut down to Micro’s, as well. 


If you thought Apple was done using smaller SIM cards, think again. Perhaps Apple was peeved they had to use a SIM card from 2003 on the shiny new iPhone 4. Maybe they just wanted to stay ahead of the curve and throw competitors off their trail.

In any case, the launch of the iPhone 5 prompted the public to realize there was a new SIM in town: the Nano-SIM. This choice to go small made life pretty difficult for users. Anyone upgrading to an iPhone 5 or switching from Android now had to get a new SIM card or an adapter.

Fortunately, most smartphones released since 2014 (both iOS and Android) now support Nano SIM card technology as the standard. Still, it’s sad to see a card that small take over, as it was always much easier changing phones with the Standard SIM compared to the Nano.

Inserting or removing a SIM card is an easy process once you determine where it is stored on your phone. Depending on the type of phone, it could be placed behind the battery. In that case, you will have to open the back panel. For other phones, the SIM cards can be found on the side of the phone.

Removing the SIM card is simple if you have the right tool. Depending on what kind of phone you have, you can easily pop it out of the slot with a paperclip or the edge of something like a credit card. There are some SIM cards that are in easier spots that can slide out with the tip of your finger.

Is installing the SIM card hard?

Not at all, it takes about ten seconds. Take a look at this example of someone placing a SIM card in a phone.



If you are not sure how to insert the SIM card, look up your phone manufacturer’s instructions online or watch a video on how to easily replace the card in the right slot.

Yes, SpeedTalk will never deny you of service but your carrier has to unlock your phone for you to be able to use any other wireless provider. Please check with your current carrier to make sure you’re out of contract and the phone is in good standing.

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