Umidigi G100x vs HMD Arc 2
A close call. Their chips, the Helio G81 (entry-level) and the Unisoc SC9863A (entry-level), are close in speed. The G100x has faster wired charging (20 W against 10 W). The G100x has the smoother screen (120 Hz against 60 Hz).
Umidigi
G100x
Helio G81
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: Helio G81 1.5 of 5, Unisoc SC9863A 1.5 of 5.
- Memory: 4 GB against 4 GB, so more apps stay open when you switch between chats and feeds.
- Front camera video for calls and lives: 720p against not listed.
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: Helio G81 1 of 5, Unisoc SC9863A 1 of 5.
- Graphics: Mali-G52 MC2 (12 nm) against PowerVR GE8322 (22 nm).
- Screen: 120 Hz 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: 1080p against not listed.
- Front camera video: 720p against not listed.
- Editing and export: Helio G81 1 of 5, 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: Helio G81 1 of 5, Unisoc SC9863A 1 of 5.
- Memory: 4 GB against 4 GB. On-phone AI features need plenty of memory; most AI assistants run online and work on any phone.
- Screen: 6.9″ IPS LCD 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: 6.9″ IPS LCD against 6.52″ IPS LCD.
- AV1 video decoding (smoother YouTube and Netflix, less battery): not listed against not listed.
- Sound: speakers not listed and a headphone jack, 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
G100x5,200 mAh20 W charging
Arc 25,000 mAh10 W charging
Efficiency: Helio G81 1 of 5, Unisoc SC9863A 1 of 5
Storage
G100x128 GBType not published
Arc 264 GBType not published
UFS opens apps and files far faster than eMMC
Speed
G100xHelio G814 GB RAM
Arc 2Unisoc SC9863A4 GB RAM
Everyday speed: 1.5 of 5 against 1.5 of 5
Screen
G100x6.9″ IPS LCD120 Hz
Arc 26.52″ IPS LCD60 Hz
Bigger is not better; pick the size you like
Toughness
G100xNo water rating published
Arc 2No water rating published
IP68 survives dust and a dunk in water
Years of updates
G100xNo promise publishedLaunched 2026
Arc 2No promise publishedLaunched July 2026
From the maker’s written update promise
Side by side
Show differences only
| Spec | G100x | Arc 2 |
|---|---|---|
| Size | 6.9″ | 6.52″ |
| Type | IPS LCD | IPS LCD |
| Resolution | 1640 × 720 | 576 × 1280 |
| Refresh rate | 120 Hz | 60 Hz |
| Peak brightness | — | 460 nits |
| Spec | G100x | Arc 2 |
|---|---|---|
| Chipset | Helio G81 | Unisoc SC9863A |
| RAM | 4 GB | 4 GB |
| Storage | 128 GB | 64 GB |
| Storage type | — | — |
| Spec | G100x | Arc 2 |
|---|---|---|
| Main camera | 32 MP | 13 MP |
| Zoom | None | None |
| Video recording | 1080p | — |
| Front camera | 8 MP | 5 MP |
| Front video | 720p | — |
| Spec | G100x | Arc 2 |
|---|---|---|
| Capacity | 5200 mAh | 5000 mAh |
| Wired charging | 20 W | 10 W |
| Wireless charging | — | — |
| Spec | G100x | Arc 2 |
|---|---|---|
| Stereo speakers | — | — |
| Headphone jack | Yes | — |
| NFC (tap to pay) | No | No |
| Dual-band GPS | No | No |
| 5G | No | No |
| eSIM | No | No |
| Spec | G100x | Arc 2 |
|---|---|---|
| Weight | 193 g | 184.5 g |
| Thickness | 8.1 mm | 8.95 mm |
| Water resistance | — | — |
| Spec | G100x | Arc 2 |
|---|---|---|
| At launch | Android 15 | Android 14 |
| OS upgrades | Not stated | Not stated |
| Security updates | Not stated | Not stated |
Quick answers
- Is the G100x or the Arc 2 better for social media?
- For social media, there’s no real difference between them. Everyday speed: Helio G81 1.5 of 5, Unisoc SC9863A 1.5 of 5.
- Is the G100x or the Arc 2 better for gaming?
- For gaming, there’s no real difference between them. Gaming power: Helio G81 1 of 5, Unisoc SC9863A 1 of 5.
- Is the G100x 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: 1080p against not listed.
- Is the G100x or the Arc 2 better for work, study and ai?
- For work, study and ai, there’s no real difference between them. Heavy work: Helio G81 1 of 5, Unisoc SC9863A 1 of 5.
- Is the G100x or the Arc 2 better for movies, music and streaming?
- For movies, music and streaming, there’s no real difference between them. Screen: 6.9″ IPS LCD against 6.52″ IPS LCD.
- Is the G100x 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.
Umidigi G100x specsHMD Arc 2 specsCompare with another phone