Lava Smart 4 vs HMD Arc 2
A close call. Both use the Unisoc SC9863A (entry-level). The Arc 2 starts with more RAM (4 GB against 3 GB).
Lava
Smart 4
Unisoc SC9863A
HMD
Arc 2
Unisoc SC9863AWhat matters to you?
Tap what you use your phone for. The overall pick then counts only those.
A close call
Neither phone is clearly better for what you chose. The cards show the trade-offs.
Backed by facts83% of areas
Pick this for…
Who wins for each way you use a phone. Tap a card for the evidence.
Social media
Chats, calls, lives and feeds
Same in practiceEither oneBenchmarksOfficialWhy? See the evidenceHide the evidence
Social media
Chats, calls, lives and feeds
- Everyday speed: both use the Unisoc SC9863A, 1.5 of 5.
- Memory: 3 GB against 4 GB, so more apps stay open when you switch between chats and feeds.
- Front camera video for calls and lives: not listed for either phone.
Gaming
Light games to heavy 3D, online and offline
Same in practiceEither oneBenchmarksOfficialWhy? See the evidenceHide the evidence
Gaming
Light games to heavy 3D, online and offline
- Gaming power: both use the Unisoc SC9863A, 1 of 5.
- Graphics: the same PowerVR GE8322 (22 nm) in both.
- Screen: not listed against 60 Hz.
- Light games run well on both. The gap shows in heavy 3D games. How long a phone holds its speed when hot needs testing, so it is not judged.
Camera and content creation
Photos, video recording and editing
Not enough infoToo little listed to call itOfficialBenchmarksWhy? See the evidenceHide the evidence
Camera and content creation
Photos, video recording and editing
- Video recording: not listed for either phone.
- Front camera video: not listed for either phone.
- Editing and export: both use the Unisoc SC9863A, 1 of 5. Storage: not listed for either phone.
- Photo and video quality need side-by-side testing, so we do not judge them from megapixels.
Work, study and AI
Learning, research, writing and AI assistants
Same in practiceEither oneBenchmarksOfficialWhy? See the evidenceHide the evidence
Work, study and AI
Learning, research, writing and AI assistants
- Heavy work: both use the Unisoc SC9863A, 1 of 5.
- Memory: 3 GB against 4 GB. On-phone AI features need plenty of memory; most AI assistants run online and work on any phone.
- Screen: 6.56″ against 6.52″ IPS LCD.
Movies, music and streaming
YouTube, Netflix, sport, music and podcasts
Same in practiceEither oneOfficialBenchmarksPublic infoWhy? See the evidenceHide the evidence
Movies, music and streaming
YouTube, Netflix, sport, music and podcasts
- Screen: 6.56″ against 6.52″ IPS LCD.
- AV1 video decoding (smoother YouTube and Netflix, less battery): not listed against not listed.
- Sound: speakers not listed, against speakers not listed.
Everyday life
Maps, ride-hailing, payments and banking
Same in practiceEither oneOfficialPublic infoWhy? See the evidenceHide the evidence
Everyday life
Maps, ride-hailing, payments and banking
- Tap to pay (NFC): no against no.
- Location: single-band GPS against single-band GPS. Dual-band GPS stays accurate between tall buildings.
Phone basics
What every use depends on, side by side.
Battery life
Smart 45,000 mAh10 W charging
Arc 25,000 mAh10 W charging
Efficiency: Unisoc SC9863A 1 of 5, Unisoc SC9863A 1 of 5
Storage
Smart 432 GBType not published
Arc 264 GBType not published
UFS opens apps and files far faster than eMMC
Speed
Smart 4Unisoc SC9863A3 GB RAM
Arc 2Unisoc SC9863A4 GB RAM
Everyday speed: 1.5 of 5 against 1.5 of 5
Screen
Smart 46.56″Refresh rate not published
Arc 26.52″ IPS LCD60 Hz
Bigger is not better; pick the size you like
Toughness
Smart 4No water rating published
Arc 2No water rating published
IP68 survives dust and a dunk in water
Years of updates
Smart 4No promise publishedLaunched August 2026
Arc 2No promise publishedLaunched July 2026
From the maker’s written update promise
Side by side
Show differences only
| Spec | Smart 4 | Arc 2 |
|---|---|---|
| Size | 6.56″ | 6.52″ |
| Type | — | IPS LCD |
| Resolution | 540 × 1210 | 576 × 1280 |
| Refresh rate | — | 60 Hz |
| Peak brightness | — | 460 nits |
| Spec | Smart 4 | Arc 2 |
|---|---|---|
| Chipset | Unisoc SC9863A | Unisoc SC9863A |
| RAM | 3 GB | 4 GB |
| Storage | 32 GB | 64 GB |
| Storage type | — | — |
| Spec | Smart 4 | Arc 2 |
|---|---|---|
| Main camera | 8 MP | 13 MP |
| Zoom | None | None |
| Video recording | — | — |
| Front camera | 5 MP | 5 MP |
| Front video | — | — |
| Spec | Smart 4 | Arc 2 |
|---|---|---|
| Capacity | 5000 mAh | 5000 mAh |
| Wired charging | 10 W | 10 W |
| Wireless charging | — | — |
| Spec | Smart 4 | Arc 2 |
|---|---|---|
| Stereo speakers | — | — |
| Headphone jack | — | — |
| NFC (tap to pay) | No | No |
| Dual-band GPS | No | No |
| 5G | No | No |
| eSIM | No | No |
| Spec | Smart 4 | Arc 2 |
|---|---|---|
| Weight | 197 g | 184.5 g |
| Thickness | 8.8 mm | 8.95 mm |
| Water resistance | — | — |
| Spec | Smart 4 | Arc 2 |
|---|---|---|
| At launch | Android 16 | Android 14 |
| OS upgrades | Not stated | Not stated |
| Security updates | Not stated | Not stated |
Quick answers
- Is the Smart 4 or the Arc 2 better for social media?
- For social media, there’s no real difference between them. Everyday speed: both use the Unisoc SC9863A, 1.5 of 5.
- Is the Smart 4 or the Arc 2 better for gaming?
- For gaming, there’s no real difference between them. Gaming power: both use the Unisoc SC9863A, 1 of 5.
- Is the Smart 4 or the Arc 2 better for camera and content creation?
- Too little is listed to call it for camera and content creation yet. Video recording: not listed for either phone.
- Is the Smart 4 or the Arc 2 better for work, study and ai?
- For work, study and ai, there’s no real difference between them. Heavy work: both use the Unisoc SC9863A, 1 of 5.
- Is the Smart 4 or the Arc 2 better for movies, music and streaming?
- For movies, music and streaming, there’s no real difference between them. Screen: 6.56″ against 6.52″ IPS LCD.
- Is the Smart 4 or the Arc 2 better for everyday life?
- For everyday life, there’s no real difference between them. Tap to pay (NFC): no against no.
What we don’t judge on
Security patch level, charging watts, megapixels, benchmark scores and guessed values.
- Security patch level and other software settings change with every update, so one reading can’t judge a phone. We use the maker’s written update promise.
- Charging watts, megapixels, screen size and weight are shown, never scored as better: faster charging doesn’t make a battery last longer, and more megapixels don’t make better photos.
- Chip estimates (1 to 5) come from published design facts: core design and year, graphics, manufacturing and video features. Photo quality and how long a phone holds its speed when hot need testing, so they aren’t judged.
- Values with no source show “not published” and stay out of the verdict.