Mohs Hardness Scale Testing (Back Surfaces)

• Level 2 (Gypsum): No damage to any smartphones
• Level 3 (Calcite):
  • Light surface scratches on Galaxy S1-S5 (plastic phones)
  • No damage on S6 and beyond (glass phones)
  • Nokia 3310 also scratched at this level
• Level 4 (Fluorite):
  • Deep gouges on all plastic phones (S1-S5)
  • S1-S5 receive 4 durability points (final score for plastic phones)
  • Light marks on glass devices that can be rubbed off
• Level 5 (Apatite): Saws through plastic phones easily, no damage on glass
• Level 6 (Orthoclase):
  • Plastic phones heavily damaged
  • Light damage begins on glass phones (S6, S7, S8)
  • S9 and S10 show no permanent damage
• Level 7 (Quartz): Scratches glass devices but with resistance
• Level 8 (Topaz): Deep gouges on all devices regardless of material or Gorilla Glass generation

Screen Scratch Testing

• Levels 2-3: No damage on any glass screens
• Level 4: Marks that can be wiped off begin appearing
• Level 5: Equally uneventful
• Level 6: Light scratches on all devices from Gorilla Glass 1 (S1) to Gorilla Glass 6 (S10)
• Level 7: Slightly deeper cuts with more ease
• Level 8: Easy scratching, very noticeable damage
• Final Score: All smartphones receive 8 points for screen scratch resistance

Invisible Shield Glass Fusion Testing

• Installation process includes cleaning, dust removal, bracket system for perfect alignment
• Level 3: Light scratches on impact-resistant layers (better than built-in protector)
• Level 4-5: No permanent damage
• Level 6+: Similar performance to regular glass but with added protection layers

Back Glass Damage During Testing

• S8 back shattered from scratching + pressure
• S6, S7, S8 suffered back damage
• S9, S10 remained intact due to thicker glass implementation
• Points deducted based on damage severity

Physical Durability Testing Results

Galaxy S1

• Bend Test: No structural damage, no creaking
• Light Hammer: Tiny scratch only
• Heavy Hammer: Minimal visible mark
• Side Hit: No structural damage
• Reverse Hammer: Barely visible mark, completely usable
• Result: Exceptional durability performance

Galaxy S2

• Bend Test: Phone rendered nearly useless, significant structural failure
• Hammer Tests: Additional damage but already compromised
• Side Hit: Decent resistance
• Result: Major durability regression from S1

Galaxy S3

• Bend Test: Concerning creaking, no visible damage
• Hammer Tests: Minor surface scratches, display functional
• Side Hit: Excellent resistance
• Reverse Hammer: Permanent pink line, boot loop within 2 minutes
• Result: Good physical resistance until final test

Galaxy S4

• Bend Test: Definite flex, cracking, significant screen damage
• Other Tests: Minimal additional damage
• Reverse Hammer: Heavy cracking, screen partially functional
• Result: Poor initial resistance, "Life Companion" irony noted

Galaxy S5

• Bend/Hammer Tests: Appeared fine externally
• Side Hit: Internal damage despite unharmed trim
• Reverse Hammer: Remaining screen functionality lost
• Result: Hidden internal vulnerabilities

Galaxy S6

• Bend Test: One slight cracking sound, minimal visible damage
• Light Hammer: Massive crack spread across entire front
• Heavy Hammer: Metal trim resisted but glass already compromised
• Side Hit: Damaged front and back due to existing cracks
• Reverse Hammer: Complete device failure
• Result: 30 points total - extremely fragile, worst performer

Galaxy S7

• Bend Test: Audible cracking sounds
• Hammer Tests: Couple of scratches only
• Side Hit: Good resistance
• Reverse Hammer: Large crack but screen remained functional
• Result: Average durability performance

Galaxy S8

• Design Context: First phone with curved front and back
• All Tests: Every test left visible damage
• Vulnerability: Highly susceptible to breaking
• Back Damage: Small glass pieces scattered on table
• Result: Poor durability, justified early concerns

Galaxy S9

• Bend Test: Mega durable, no audible damage (10/10)
• Light Hammer: Very little damage
• Heavy Hammer: Minimal impact
• Side Hit: Side trim unaffected, back glass cracked
• Reverse Hammer: No additional screen damage
• Result: Significant improvement due to thicker glass

Galaxy S10

• Bend Test: No problems
• Light Hammer: No damage
• Heavy Hammer: Subtle screen warping (only visible when panning)
• Side Hit: Good performance, minor back cracking
• Reverse Hammer: Almost no front damage
• Result: Properly durable phone, continued improvement

Galaxy S10 with Glass Fusion Guard

• All Tests: Similar performance to regular S10
• Protection Verification: Screen underneath completely fine after removal
• Impact Design: Specifically engineered for impact resistance
• Multiple Hits: Withstood 3 reverse hammer hits

Nokia 3310

• Bend Test: Not possible due to design
• First Hammer: Screen destroyed immediately
• Side Hit: Mark left, no structural damage
• Body Durability: Completely indestructible as advertised
• Table Damage: Table broke before phone during testing
• Back Panel: Removable back came off, easily reattached
• Result: Display vulnerable, body invincible

Overall Durability Trends Analysis

• Early Era: Durable brick-like designs (S1, Nokia 3310)
• Transition Period: Focus shifted to thinness and form factor (S2-S8)
• Recent Improvement: Technology advancement enabling both slim design and durability (S9-S10)
• Material Impact: Thicker glass more effective than Gorilla Glass generation upgrades
• Design Evolution: Curved surfaces increased vulnerability (S8 particularly affected)
• Current Trend: Upward trajectory in durability while maintaining aesthetics