Samsung SM-G9558 Galaxy S8+ TD-LTE 128GB (Samsung Dream 2)

We need to produce description focusing on differences from base model and other variants. Base model description includes: dimensions 73.4mm wide, 159.5 tall, 8.1 thick, weight 173g, 6.22-inch AM-OLED panel, 1440x2880 resolution, 6 GiB RAM, 3500 mAh battery, Korean-language Android, single SIM.

Variant: Samsung SM-G9558 Galaxy S8+ TD-LTE 128GB (Samsung Dream 2). Spec sheet differences: Type: Color AM-OLED display (same?), Display size: 6.22" (same), Resolution: 1440x2960 (different from base: base 1440x2880). OS: Google Android 7.0 (Nougat) (base Korean-language version of Android - unspecified version? base says Korean-language version of Android, not version; we can note OS difference). RAM: 4 GiB (base 6 GiB). Battery: 3500 mAh (same). Dimensions: 73.4 x 159.1 x 8.1 (height 159.1 vs base 159.5, width same, thickness same). Weight: 173 g (same). SIM: single (same). Storage: 128GB (not in base description; base didn't mention storage; but base model description didn't include storage; we can mention storage difference? The instruction: focus on differences: how this variant differs from base model, and how it differs from other listed variants. Base model description didn't mention storage, so we can mention storage as a difference if not in base description. However base model description didn't mention storage, so it's not repeating base description. It's okay to mention storage. But we must not repeat any fact already stated in base model description. Base model description didn't mention storage, OS version, RAM, resolution, dimensions height, etc. So we can mention those.

Now compare to other variants list: many variants have 4 GiB RAM, 6 GiB RAM, various storage (64GB,128GB), Duos (dual SIM), etc. This variant is SM-G9558, single SIM, TD-LTE, 128GB, 4 GiB RAM, Android 7.0, resolution 1440x2960, height 159.1mm.

We need to note how it differs from other listed variants: e.g., other variants include SM-G955FD Duos (dual SIM) with 6GiB or 4GiB, SM-G9550 Duos 64GB 4GiB, SM-G955J WiMAX, SM-G955D TD-LTE SC-03J/SGH-N206, SM-G9550 Duos 128GB 6GiB, SM-G955N TD-LTE 128GB 6GiB, SM-G955W TD-LTE 4GiB, SM-G955U1 LTE-A 4GiB, SM-G955U TD-LTE 4GiB, SM-G955F TD-LTE 4GiB.

Thus differences: this variant is single SIM (while many others are Duos/double SIM except some like SM-G955U, SM-G955U1, SM-G955W, SM-G955F, SM-G955D? Actually SM-G955D is TD-LTE SC-03J / SGH-N206, not specified Duos; likely single? Not sure. But we can note it's single SIM while several others are Duos. Also it has 128GB storage (like some others: SM-G955FD Duos 128GB 6GiB, SM-G9550 Duos 128GB 6GiB, SM-G955N 128GB 6GiB). It has 4GiB RAM (like many). It has Android 7.0 Nougat (base Korean-language Android unspecified version; many others likely also Android 7.0? Not given). It has resolution 1440x2960 (vs base 1440x2880; other variants not listed with resolution; assume same as base? Not given, but we can note it's slightly taller resolution). Dimensions: height 159.1mm vs base 159.5mm (0.4mm shorter). Weight same.

Thus we need to write short description focusing on differences. Avoid repeating base description facts: do not mention width 73.4mm, thickness 8.1mm, weight 173g, display size 6.22", AM-OLED, battery 3500mAh, single SIM (though base also had single SIM; but base description said single SIM, so we cannot repeat that). Actually base description said "It ships with a Korean‑language version of Android, and the handset supports a single SIM card". So we cannot repeat single SIM. So we must avoid mentioning single SIM. Also cannot repeat dimensions width, thickness, weight, display size, battery, etc.

Thus we can mention: resolution 1440x2960 (slightly taller than base), height 159.1mm (0.4mm shorter), OS Google Android 7.0 Nougat (vs Korean-language Android), RAM 4 GiB (vs 6 GiB), storage 128GB (not mentioned in base). Also note it's a TD-LTE variant (maybe base didn't specify network? Base description didn't mention network; but base model is Galaxy S8+ generic; we can mention TD-LTE as difference). Also note it's single SIM? Can't repeat. But we can mention it's not Duos (i.e., single SIM) as difference from Duos variants. However base already said single SIM, so mentioning single SIM repeats base fact. But we can say "Unlike the Duos variants, this model retains a single SIM configuration" - that repeats base fact? It mentions single SIM, which is base fact. Might be considered repeating. Safer to avoid mentioning SIM at all. Instead we can differentiate by noting it's not a Duos model (i.e., no dual SIM). But that implies single SIM. Might be okay but risk. Better to avoid SIM entirely.

Thus we can talk about: resolution, height, OS, RAM, storage, TD-LTE network, maybe model number.

Now compare to other variants: many are Duos, some have 6GiB RAM, some have 64GB storage, some have WiMAX, some have different carrier-specific models. So we can say: Unlike the Duos models (SM-G955FD, SM-G9550 etc.) this variant offers a single SIM slot; compared to the 6GiB RAM versions (SM-G955FD 128GB 6GiB, SM-G955N 128GB 6GiB, SM-G9550 Duos 128GB 6GiB) it has 4GiB RAM; compared to the 64GB SM-G9550 Duos 64GB 4GiB it doubles storage; compared to the WiMAX SM-G955J it uses TD-LTE instead of WiMAX 2+; compared to the carrier-specific SM-G955D (SC-03J/SGH-N206) it lacks those carrier branding; compared to the LTE-A SM-G955U1 it uses TD-LTE rather than LTE-A; compared to the SM-G955W/W8 it shares similar RAM but differs in resolution and OS.

We need to keep it short, 0-5 short paragraphs, plain prose, no bullet points.

Let's craft maybe 2 paragraphs.

Paragraph 1: differences from base model: resolution, height, OS, RAM, storage, TD-LTE.

Paragraph 2: differences from other variants: not Duos, 4GiB vs some 6GiB, 128GB vs 64GB, TD-LTE vs WiMAX/LTE-A/carrier-specific, etc.

Make sure not to repeat base facts: avoid width, thickness, weight, display size, battery, single SIM. Also avoid mentioning "Korean-language version of Android" (we can mention OS is Google Android 7.0 Nougat, which differs). Avoid repeating "AM-OLED display" maybe base said "AM-OLED panel". The variant spec says "Type: Color AM-OLED display". That's same type; but base already said AM-OLED panel. Repeating "AM-OLED" might be considered repeating a fact? It's a fact about display type. Base description said "Its front is dominated by a 6.22‑inch AM‑OLED panel". So mentioning AM-OLED repeats that fact. Better to avoid mentioning display type altogether. We can mention resolution and size but not type. However size is same as base (6.22") - that repeats base fact (size). So we cannot mention display size either because base gave that. So we cannot mention display size or type. So we can only mention resolution (different), maybe not mention display at all. But we need to mention something about display? Could mention resolution only, not size or type. That's okay because base didn't mention resolution. So we can say "The screen offers a 1440×2960 pixel resolution". That's fine.

Similarly, we cannot mention dimensions width, thickness, weight. But we can mention height difference (159.1mm) because base gave height 159.5mm. So we can mention height.

We cannot mention battery capacity (same as base). So avoid.

We cannot mention SIM (single). So avoid.

We cannot mention weight.

We cannot mention width/thickness.

We can mention OS, RAM, storage, network type (TD-LTE), maybe model number.

Now check other variants: many have TD-LTE as well (SM-G955FD, SM-G9550, SM-G955N, SM-G955W, SM-G955U, SM-G955U1, SM-G955F). So TD-LTE is not unique. But we can mention it's a TD-LTE variant (maybe base didn't specify network). Base description didn't mention network, so it's okay to mention TD-LTE as difference.

Now craft paragraphs.

Paragraph 1: "Compared with the base Galaxy S8+, this SM‑G9558 model steps the screen resolution up to 1440×2960 pixels while keeping the same 6.22‑inch panel, and it is slightly shorter at 159.1 mm tall. It runs Google Android 7.0 Nougat instead of the Korean‑language Android shipped on the base model, and its memory is trimmed to 4 GiB of RAM. Storage is fixed at 128 GB."

Paragraph 2: "Among the other S8+ variants, this unit stands out as a single‑SIM TD‑LTE phone (where many are Duos dual‑SIM models), and it offers the 4 GiB RAM/128 GB combo that is rarer than the 6 GiB/128 GB versions (SM‑G955FD, SM‑G955N, SM‑G9550 Duos) and the 64 GB/4 GiB SM‑G9550 Duos. Unlike the WiMAX‑based SM‑G955J, it uses TD‑LTE, and it lacks the carrier‑specific branding of the SM‑G955D (SC‑03J/SGH‑N206) and the LTE‑A focus of the SM‑G955U1."

Check for any repeated base facts: We didn't repeat width, thickness, weight, display size, battery, single SIM. We mentioned "same 6.22‑inch panel" - that repeats display size (6.22-inch). Base description said "6.22‑inch AM‑OLED panel". So mentioning 6.22‑inch repeats that fact. Must avoid. So we cannot mention the display size. We need to avoid repeating any fact already stated in base model description. Base model description included: dimensions (73.4mm wide, 159.5mm tall, 8.1mm thick), weight 173g, front dominated by a 6.22‑inch AM‑OLED panel, resolution 1440x2880, 6GiB RAM, 3500mAh battery, Korean-language Android, single SIM. So we cannot mention any of those.

Thus we cannot mention 6.22-inch, cannot mention AM-OLED, cannot mention weight, dimensions, battery, RAM (6GiB), resolution (1440x2880), Korean-language Android, single SIM.

We can mention: resolution 1440x2960 (different), height 159.1mm (different from 159.5), OS Google Android 7.0 Nougat (different from Korean-language Android), RAM 4GiB (different from 6GiB), storage 128GB (not mentioned), maybe TD-LTE (not mentioned), maybe model number (not mentioned). Also we can mention that it's a TD-LTE variant (network type not in base). Also we can mention that it's not Duos (but that implies single SIM which base mentioned; but we can say "Unlike the Duos variants..." which references Duos, not single SIM. That's okay because we are not stating it's single SIM; we are contrasting with Duos. That does not repeat base fact about single SIM. It's okay.

We must avoid saying "single SIM". So we will not mention SIM at all.

Now rewrite paragraph 1 without mentioning display size.

Paragraph 1: "Compared with the base Galaxy S8+, the SM‑G9558 model steps the screen resolution up to 1440×2960 pixels and is slightly shorter at 159.1 mm tall. It runs Google Android 7.0 Nougat instead of the Korean‑language Android shipped on the base model, and its memory is trimmed to 4 GiB of RAM. Storage is fixed at 128 GB."

Check: we didn't mention width, thickness, weight, display size, battery, Korean-language Android? We mentioned Korean-language Android as comparison, that's okay because we are stating it's different. We didn't repeat the fact that base has Korean-language Android; we mentioned it as a point of difference. That's allowed because we are not repeating the fact as a statement about the base? The instruction: "you must NOT repeat it or any fact already stated in it." So we cannot repeat any fact already stated in the base model description. The base model description stated: "It ships with a Korean‑language version of Android". So repeating that phrase "Korean‑language version of Android" is repeating a fact already stated. So we cannot mention "Korean‑language version of Android" at all. We must avoid repeating that exact phrase or the fact. So we cannot mention that the base has Korean-language Android. We can say "runs Google Android 7.0 Nougat" without referencing the base's OS. That's okay because we are not repeating the base's OS fact. We just state the variant's OS. That's fine. We must not mention that the base has Korean-language Android. So we should avoid referencing it. So we just say "runs Google Android 7.0 Nougat". No mention of base OS.

Similarly, we cannot mention that base has 6GiB RAM. We can say "has 4 GiB of RAM". That's okay because we are not repeating base's RAM fact. We are stating variant's RAM. That's fine.

We cannot mention base's resolution 1440x2880. We can say "screen resolution of 1440×2960 pixels". That's fine.

We cannot mention base's dimensions: we can mention height 159.1mm (different). That's fine because we are not repeating base's height. We are stating variant's height.

We cannot mention base's weight. We don't mention weight.

We cannot mention base's battery. We don't mention battery.

We cannot mention base's single SIM. We don't mention SIM.

We cannot mention base's display size. We don't mention display size.

We cannot mention base's AM-OLED panel. We don't mention panel type.

Thus paragraph 1 is okay.

Paragraph 2: compare to other variants. We must avoid repeating any facts from base model description. We can mention other variants' attributes (like Duos, 6GiB, 64GB, WiMAX, carrier-specific, LTE-A). Those are not in base description, so fine.

We must avoid saying "single SIM". We'll avoid.

Paragraph 2: "Among the other S8+ variants, this unit stands out as a TD‑LTE model that is not a Duos dual‑SIM phone, and it pairs 4 GiB of RAM with 128 GB of storage—a combination less common than the 6 GiB/128 GB versions (SM‑G955FD, SM‑G955N, SM‑G9550 Duos) and the 64 GB/4 GiB SM‑G9550 Duos. Unlike the WiMAX‑based SM‑G955J, it uses TD‑LTE, and it lacks the carrier‑specific branding of the SM‑G955D (SC‑03J/SGH‑N206) and the LTE‑A focus of the SM‑G955U1."

Check for any repeated base facts: We didn't mention width, thickness, weight, display size, battery, RAM 6GiB, resolution, Korean-language Android, single SIM. Good.

We mentioned "TD‑LTE model". Base description didn't mention network, so okay.

We mentioned "not a Duos dual‑SIM phone". That's not repeating base fact (base said single SIM, but we are not stating it's single SIM; we are saying it's not Duos. That's okay.)

We mentioned "4 GiB of RAM with 128 GB of storage". That's fine.

We mentioned "6 GiB/128 GB versions". That's referencing other variants, not base.

We mentioned "64 GB/4 GiB SM