If you put the Samsung Galaxy A8 (2018) beside the Samsung Galaxy S24 Ultra today, the gap feels unreal. One phone belongs to a simpler era, while the other is Samsung’s most powerful device yet. From my real testing experience, the A8 (2018) still performs well for calls and light apps, but the S24 Ultra flies through everything. Processor speed, camera quality, display sharpness, and battery life are worlds apart. For anyone looking to buy Samsung Galaxy A8 (2018) or Samsung Galaxy S24 Ultra mobile in Bangladesh, this is not a normal upgrade. It is a complete lifestyle shift in daily use, gaming, photography, and long-term reliability. 

If you have been buying phones in Bangladesh for a few years, this price gap will feel very real. The Samsung Galaxy A8 (2018) launched at around ৳48,000, which felt premium at that time. Today, Samsung no longer sells it officially. 

The Galaxy S24 Ultra sits in a completely different league. Officially in Bangladesh, it costs around ৳233,000 with full Samsung warranty. In grey-market shops, the same phone usually sells between ৳88,000 and ৳105,000, depending on storage and import source. From regular market visits, these prices change often. Dollar rate movement, shipment timing, and demand all affect the final number. During Eid or year-end sales, some sellers add small discounts or bundle gifts, but it remains a premium purchase.

For buyers who find the S24 Ultra too expensive, the Samsung Galaxy S23 Ultra often appears as a strong alternative. In Bangladesh, its grey-market price usually stays lower while still offering flagship-level performance and camera quality. Many users choose it as a balance between price and long-term value.

For most Bangladeshi buyers, the choice between official and grey-market phones is both emotional and practical. Official units usually cost around 8 to 12 percent more, but they offer peace of mind and better resale value. Grey-market phones save money upfront, but long-term support becomes uncertain. EMI options up to 12 months are commonly available for official units, and trade-in offers can sometimes reduce ৳8,000 to ৳15,000 from the final price. 

When it comes to gaming, these two phones feel like they belong to different generations. The Samsung Galaxy A8 (2018) was never built for heavy gaming. It uses the Exynos 7885 chipset with a Mali-G71 GPU, which struggles with modern titles. Based on verified performance data, PUBG Mobile runs only on low graphics, averaging around 25 to 30 FPS with frequent frame drops. Games like Call of Duty Mobile and Genshin Impact are either unsupported or effectively unplayable due to lag, long loading times, and overheating. After 15 to 20 minutes of gameplay, the phone heats up noticeably, and battery drain becomes aggressive.

The Samsung Galaxy S24 Ultra is built for sustained high-performance gaming. It runs on the Snapdragon 8 Gen 3 for Galaxy, paired with the Adreno 750 GPU. According to benchmark and real-world gaming data, PUBG Mobile supports 90 FPS, while Call of Duty Mobile and Free Fire Max comfortably reach 120 FPS on high settings. Genshin Impact runs at around 60 FPS with stable frame pacing and minimal throttling. Thermal management is significantly better, and even after 30 minutes of gameplay, heat remains controlled. Battery drain stays efficient, averaging about 5 to 8 percent per 30 minutes, depending on the game. 

In real-world gaming use, the Galaxy A8 (2018) is limited to very casual titles. The Galaxy S24 Ultra feels future-ready and reliable for long gaming sessions, even in Bangladesh’s warmer climate. For anyone who plays games regularly, the difference is not small. It is massive.

These two phones come from completely different smartphone eras. One was built for basic daily use in 2018, while the other defines Samsung’s flagship experience today. When used side by side, the differences are impossible to ignore.

• Everyday speed and smoothness: The Galaxy A8 (2018) can still handle calls and basic apps, but daily use feels slow today. App loading takes time, and multitasking causes stutter. The Galaxy S24 Ultra feels instant and stays smooth all day.

• Multitasking and long use: Switching between apps on the A8 (2018) often forces reloads due to memory limits. The S24 Ultra keeps many apps active and feels reliable for work, gaming, and heavy use.

• Display usability outdoors: The A8 (2018) Super AMOLED screen looks fine indoors but struggles in sunlight. Outdoor visibility is weak. The S24 Ultra remains clear under strong Bangladeshi sunlight.

• Camera consistency: The A8 (2018) takes decent daylight photos, but low-light shots are soft and inconsistent. Focus can feel slow. The S24 Ultra delivers sharp photos in almost any lighting and stable video.

• Battery confidence: The A8 (2018) often needs a midday charge, especially with aging batteries. The S24 Ultra easily lasts a full heavy-use day.

• Software support and longevity: Software updates have ended for the A8 (2018), which affects security and app compatibility. The S24 Ultra still has years of updates ahead, making it a safer long-term choice.

Bottom line: The Galaxy A8 (2018) is only suitable for basic use today and feels outdated in every key area. The Galaxy S24 Ultra delivers a smooth, reliable, and future-ready experience, making it the clear choice for long-term use in Bangladesh. 

When it comes to network and connectivity, the difference between these two phones becomes very noticeable in everyday use in Bangladesh.

• Mobile network support: The Samsung Galaxy A8 (2018) supports 4G LTE only. It works on all local operators, but data speeds feel slow by today’s standards. In busy areas, signal drops and slower loading are common.
  The Samsung Galaxy S24 Ultra supports both 5G and advanced 4G LTE. Although 5G is still limited in Bangladesh, its newer modem delivers faster and more stable speeds on existing networks.

• Local carrier experience: Both phones are compatible with Grameenphone, Robi, Banglalink, and Teletalk. However, real-world performance differs. The A8 (2018) often struggles during peak hours, while the S24 Ultra maintains stronger signal strength and more consistent data speeds on the same networks.

• Call quality and signal stability: On the A8 (2018), indoor signal strength can weaken, especially in concrete buildings. Voice calls may sound less clear at times.
  The S24 Ultra holds signal better indoors and outdoors, with clearer calls and fewer drops during travel.

• Wi-Fi and Bluetooth: The A8 (2018) uses older Wi-Fi and Bluetooth standards, which limits speed and connection range.
  The S24 Ultra supports newer Wi-Fi and Bluetooth versions, making hotspots, wireless audio, and file sharing more reliable.

• GPS and navigation: GPS works on the A8 (2018), but location lock can be slow at times. The S24 Ultra locks onto location quickly and stays accurate, which helps with maps, ride-sharing, and delivery apps. 

The primary source was GSMArena, which provided detailed camera hardware specifications for both phones. From GSMArena, information such as the 16 MP rear and front cameras of the Samsung Galaxy A8 (2018), its f/1.7 aperture, phase-detection autofocus, and 1080p video recording limit was used. For the Samsung Galaxy S24 Ultra, GSMArena confirmed the 200 MP main camera with optical image stabilization, a multi-camera setup, and advanced video capabilities. Additional confirmation came from the Samsung Official Website, which details the Galaxy S24 Ultra’s camera system, image processing focus, and support for high-resolution video recording. 

All display-related information in this comparison comes from verified specifications and real-world display analysis published by trusted sources. The Samsung Galaxy A8 (2018) uses a 5.6-inch Super AMOLED display with Full HD+ resolution and a standard 60Hz refresh rate. According to GSMArena, it delivers good colors and contrast indoors, but brightness is limited, making outdoor visibility weaker by today’s standards. The same source confirms the lack of HDR support and basic display calibration.

For the Samsung Galaxy S24 Ultra, data was taken from GSMArena and the Samsung Official Website. It features a 6.8-inch Dynamic LTPO AMOLED 2X display with QHD+ resolution, an adaptive refresh rate of up to 120Hz, HDR10+ support, and very high peak brightness. Samsung also confirms the use of Gorilla Armor glass for improved reflection control. 

Choose the Samsung Galaxy A8 (2018) only if you need a very basic phone for calls, messaging, and light use at a low cost. For everyone else, the Samsung Galaxy S24 Ultra is the better choice. It offers far better performance, camera quality, display, battery life, and long-term software support, making it a smarter and safer investment in Bangladesh. 

The Samsung Galaxy A8 (2018) served its purpose well in its time, but today it feels outdated and limited to very basic use. The Samsung Galaxy S24 Ultra delivers a modern flagship experience with powerful performance, an excellent display, and reliable cameras. For long-term use in Bangladesh, the S24 Ultra is the clear winner. 

Is the Samsung Galaxy S24 Ultra worth upgrading to from the Galaxy A8 (2018)?
Yes. The upgrade brings major improvements in performance, camera quality, display, battery life, and long-term software support.

Which phone is better for gaming?
The Galaxy S24 Ultra is far superior. The Galaxy A8 (2018) is limited to casual games and low frame rates.

How big is the camera difference between the two phones?
The difference is very noticeable. The Galaxy A8 (2018) has a basic single camera, while the Galaxy S24 Ultra offers flagship-level photography and video.

Which phone has better battery life?
The Galaxy S24 Ultra easily lasts a full heavy-use day. The Galaxy A8 (2018) often needs charging before the day ends.

Which phone is better for long-term use in Bangladesh?
The Galaxy S24 Ultra is the better long-term choice due to stronger performance, better network support, and ongoing updates.