
Plastic phones are less prone to cracking than their glass-backed counterparts. While glass screens are more susceptible to cracking under intense pressure, plastic phones are lightweight, durable, and easier to repair. They also do not interfere with 5G signals, making them a popular choice for manufacturers. However, plastic screens have their drawbacks, including the tendency to yellow over time and being more susceptible to scratches. Despite this, the structural design of a phone plays a significant role in its resistance to cracking, regardless of the material used.
| Characteristics | Values |
|---|---|
| Lightweight | Plastic phones are significantly lighter than glass-backed phones |
| Durable | Plastic phones are more durable than glass-backed phones |
| Repairable | Plastic phones are easier to repair than glass-backed phones |
| Signal Strength | Plastic is invisible to radio waves, which means better signal strength |
| Structural Design | The structural design of a phone, including the materials used, affects its susceptibility to cracking |
| Flexibility | Plastic is more flexible than glass, making it less likely to crack under pressure |
| Rigidity | Plastic can provide overall rigidity to a device, protecting its internal components |
| Scratch Resistance | Plastic is more scratch-resistant than glass |
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What You'll Learn

Plastic phones are lightweight and durable
Plastic is also beneficial for phone manufacturers. It is practically invisible to radio waves, so manufacturers do not need to worry about signal strength or antenna bands when designing plastic phones. This makes it easier to work with sensitive 5G technology. Plastic phones are also slightly easier to repair than glass-backed phones, as the back can usually be opened with just a fingernail, and the battery can be swapped out easily.
The durability of plastic phones also extends to their screens. While plastic screen protectors used to be common, they have been replaced by tempered glass, which is more scratch-resistant. However, a glass screen protector may not be necessary, as a plastic phone screen is less likely to crack or shatter than a glass one.
Despite the benefits of plastic phones, there are some drawbacks. Plastic phones may not be perceived as premium as metal and glass phones, and they can be more susceptible to scratches and scuffs. Plastic can also discolour and yellow over time, affecting the display. However, advancements in glass technology have allowed for thinner and stronger glass touchscreens, making it a more appealing option for consumers.
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Plastic is invisible to radio waves, improving signal strength
Plastic phones are preferred by some due to their lightweight and durable nature. They are also less prone to cracking and shattering compared to glass-backed phones. Plastic phones are also advantageous because they do not interfere with radio waves, which improves signal strength.
Radio waves are a type of electromagnetic radiation that is used to transmit information wirelessly. Plastic is a material that is transparent to radio waves, meaning that radio waves can pass through it without being absorbed or reflected. This property of plastic makes it ideal for use in phone design as it does not interfere with the transmission of radio signals, which are crucial for wireless communication.
The use of plastic in phone design offers several benefits in terms of signal strength. Firstly, plastic does not require antenna bands, which are necessary for metal or glass phones to transmit and receive signals. This simplifies the design process and reduces potential sources of signal interference. Secondly, plastic's transparency to radio waves improves signal strength by allowing for more efficient signal transmission and reception. This is especially important with the introduction of 5G technology, which relies on strong and stable signal connections.
The impact of plastic on signal strength is evident in the performance of certain plastic-backed phones, such as the Galaxy Note 20 5G and the Moto G 5G. These phones have demonstrated strong signal reception, showcasing the practical advantages of plastic in improving signal strength.
While plastic offers benefits in terms of signal strength, it is important to consider other factors that contribute to overall signal quality. The structural design of a phone, including its internal components and antenna placement, also play a significant role in signal reception. Additionally, advancements in glass technology have led to the development of stronger and thinner glass alternatives, addressing some of the durability concerns associated with glass-backed phones.
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Plastic phones are easier to repair
Plastic phones are generally easier to repair than their glass-backed counterparts. While plastic phones are not as repairable as they used to be, they are still more repair-friendly than other phones. For instance, the Pixel 3a and Pixel 4a are easy to open and secured by light, manageable adhesive.
The lead designer behind Samsung's Galaxy S5 stated that plastic makes battery swaps and repairs easier. The back of the S5 can be opened with just a fingernail, unlike the hour-long process of replacing the glass-backed Galaxy S6's battery.
Plastic phones are also lightweight, durable, and stylish. They are practically invisible to radio waves, so manufacturers don't need to worry about antenna bands or signal strength. This makes it easier to deal with sensitive 5G technology.
Despite the advantages of plastic phones, repairing them can still be a frustrating and time-consuming process. However, they are less likely to crack or shatter upon impact, often only sustaining minor scuffs or scars. This makes plastic phones a more durable option that may not require repairs as frequently as glass-backed phones.
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Plastic phones are less likely to crack from twisting or bending
The structural design of a phone plays a crucial role in its susceptibility to cracking. For example, the Samsung Galaxy S3 and S4, with their plastic backs, perform similarly to the iPhone in break tests. However, the iPhone's aluminum rear casing is significantly less flexible than the plastic-framed Galaxy phones. This increased rigidity in the iPhone's structure makes it more vulnerable to cracking under torsion or bending.
Additionally, plastic phones often feature a removable battery, which is easily accessible by opening the back cover. This design choice not only simplifies battery swaps and repairs but also contributes to the overall flexibility of the device. By comparison, glass-backed phones, such as the Galaxy S6, may require a lengthy and complicated process to replace the battery.
It is worth noting that advancements in glass technology have led to the development of thinner glass touchscreens that maintain strength. However, these thinner displays are still susceptible to cracking under intense applied pressure. Plastic phones, on the other hand, may not provide the same level of premium aesthetics, but they excel in durability and weightlessness.
While plastic phones offer advantages in terms of reduced cracking and flexibility, they are not without their drawbacks. Plastic screens can scratch more easily and may develop a yellowish tint over time, affecting the display's appearance. Despite these limitations, plastic phones remain a viable option for those seeking a lightweight, durable, and impact-resistant device.
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Plastic phones are more affordable than glass alternatives
Plastic phones are also more durable than glass alternatives. Plastic is tough to shatter and scratch, especially when compared to glass. Glass phones are heavy and brittle, and when they do break, they often shatter into many small pieces. Plastic phones, on the other hand, may only suffer a scuff or a minor scar when dropped.
Additionally, plastic phones are easier to repair than glass-backed phones. For example, the Pixel 3a and Pixel 4a are secured by light, manageable adhesive, making them easier to open than glass-backed phones. The newer Pixel 4a also features an accordion design, which allows for quick access to the phone's internals by removing a single midframe screw.
Plastic phones also offer better wireless charging and 5G capabilities than glass alternatives. Plastic is practically invisible to radio waves, so phone manufacturers don't need to worry about antenna bands or signal strength when working with plastic phones. This makes it easier to deal with sensitive 5G technology and improves wireless charging capabilities.
While plastic phones may have been criticised in the past for their "cheap" appearance, this is often due to poor design choices rather than the use of plastic itself. Plastic phones can look fantastic with satin or matte finishes, and some users may prefer the textured surface of a plastic phone to the smooth, fingerprint-prone surface of a glass phone.
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Frequently asked questions
Plastic phones are less likely to crack because plastic is a flexible material. If you can twist or bend your phone, it's the flexibility that reduces the pressure that could otherwise crack a glass screen.
Yes, plastic phones are lightweight. For example, the Pixel 4a weighs just 5.04 ounces despite its 5.8-inch display.
Plastic phones are durable because they are less likely to crack when dropped. However, they can still get scuffed or scratched.
Plastic phones are generally easier to repair than glass-backed phones. For example, the Samsung Galaxy S5 allows users to open the back and replace the battery using just their fingernail.
No, plastic phones do not have signal issues. In fact, plastic is better than metal for radio waves to pass through, so antenna bands or signal strength are not a concern.
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