Best GSM Gate Opener Modules in 2026: Complete Comparison
Side-by-side comparison of the two most popular GSM gate opener modules: RTU5024 and Callny G202 PLUS. Both support 999 users, but they differ in SIM size, access control features, user roles, 4G availability, and price. This guide compares them across 7 categories and recommends which module fits each use case.
The verdict in 60 seconds
For most residential single-gate installs in 2026, buy the RTU5024 (4G variant). It is the cheapest reliable module, has the largest community, and is supported by every third-party app worth installing. If your country has already shut down 2G, step up to the RTU5035 for guaranteed LTE coverage. Pick the Callny G202 PLUS only if you specifically need time-window access. Skip the RTU5015 — it is 2G-only and on borrowed time.
You're searching for a GSM gate opener module and every result is either a product listing with no context or a "best smart gate opener" article that only covers physical gate motors. Nobody compares the actual GSM relay modules side by side. This guide ranks the six modules most commonly sold worldwide in 2026, with a verdict and ideal-buyer recommendation for each.
How these are ranked
Each module is scored on five dimensions, weighted in roughly this order:
- Future-proofing — does the module support 4G LTE? With 2G shutdown active in Europe, UK, Australia, and parts of the US, anything 2G-only is automatically penalized.
- Ecosystem — community size, third-party app support, breadth of available guides.
- Capacity — number of authorized users and number of relays.
- Features beyond the basics — temporary access, time-of-day scheduling, multi-tier roles.
- Price-to-performance — total cost including the kind of seller you should buy from.
Every module on this list has been tested with the GateOpener app. SMS commands and default passwords have been verified against the latest manufacturer firmware as of the date stamped at the top of this article.
Head-to-head comparison
| Rank | Module | Price (€) | Max users | Relays | 4G LTE | Default pwd |
|---|---|---|---|---|---|---|
| 1 | RTU5024 (4G variant) | €25-45 | 999 | 1 | Yes (V2 / 4G LTE) | 1234 |
| 2 | RTU5035 | €35-55 | 999 | 1 | Yes (only) | 1234 |
| 3 | Callny G202 PLUS | €20-35 | 999 | 1 | Yes | 123456 |
| 4 | Callny G203 | €30-45 | 999 | 2 | Yes | 123456 |
| 5 | RTU5025 | €35-55 | 999 | 2 | Yes | 1234 |
| 6 | RTU5015 | €15-25 (used / clearance) | 200 | 1 | No | 1234 |
The six modules ranked
RTU5024 (4G variant)
Best for: Most people, most countries — the default safe pick.
Pros: Cheapest single-relay module, huge community, supported by every GSM gate opener app worth using.
Cons: Single relay only; no built-in temporary access; some sellers still ship 2G-only stock.
Full RTU5024 (4G variant) details →RTU5035
Best for: Anyone in a 2G-shutdown country who wants the safest 4G replacement.
Pros: LTE-only modem with proper European/UK/Australian band certification. Same SMS commands as the RTU5024 — every guide on the internet still applies.
Cons: €10-15 more than an RTU5024 4G. Less common at small resellers.
Full RTU5035 details →Callny G202 PLUS
Best for: Buyers who want features the RTU5024 lacks — time-window access and per-user open counters.
Pros: Time-of-day access scheduling, per-user counters, six-digit password (123456 default). Supported by GateOpener.
Cons: Different SMS protocol — incompatible with RTU5024 commands, smaller community, manual translation quality varies.
Full Callny G202 PLUS details →Callny G203
Best for: Mixed pedestrian + vehicle gates that need two relays on one module.
Pros: Two independent dry-contact relays, same firmware as G202 PLUS, time-window scheduling.
Cons: Only worth it if you genuinely need a second relay. Otherwise the G202 PLUS is identical.
Full Callny G203 details →RTU5025
Best for: Two-gate sites that prefer the RTU5024 command set.
Pros: Two relays, same RTU5024 password syntax and 999-user capacity.
Cons: Less commonly stocked than the RTU5024 — sometimes sold confusingly as 'RTU5024 dual relay'.
Full RTU5025 details →RTU5015
Best for: Existing owners only. Do not buy new.
Pros: Same SMS syntax as the RTU5024 — older guides still apply.
Cons: 2G-only modem, capped at 200 authorized users, no LTE upgrade path.
Full RTU5015 details →How to decide in 30 seconds
Single gate, single country, want the cheapest reliable option: RTU5024 (4G variant). Buy from BLIIoT or King Pigeon directly — avoid the bottom-of-the-barrel AliExpress clones.
Country has already shut down 2G: RTU5035. Same commands as the RTU5024, dedicated LTE modem, no fallback to a dead 2G network.
Need time-window scheduling or per-user counters: Callny G202 PLUS. The RTU5024 firmware does not do this.
Two gates or a pedestrian + vehicle setup on one module: Callny G203 or RTU5025, depending on which command syntax you prefer.
Considering an RTU5015? Don't. It is 2G-only and capped at 200 users. The RTU5024 is a drop-in replacement for similar money.
Frequently asked questions
Can I mix different gate opener modules on the same property?
Yes. Each module operates independently with its own SIM card. GateOpener manages multiple modules of different types from one app — for example, an RTU5024 on the driveway and a Callny G202 PLUS on the garage.
Which module has the best 4G support?
The RTU5035 is LTE-only and has the most modern modem with proper European, UK, and Australian band certification. The RTU5024 4G and Callny G202 PLUS 4G are both fine but are technically dual-mode 2G/4G with less band selectivity.
Do I need a specific app for each module?
Manufacturer apps only work with their own hardware. GateOpener is the only third-party app that supports both the RTU5024 protocol family and the Callny protocol family in one interface, with automatic detection.
Which module is most reliable in fringe signal areas?
In our testing, the RTU5035 had the best receive sensitivity for marginal LTE coverage. For 2G/3G areas the RTU5024 from BLIIoT (not the bargain clones) was the most stable. Antenna placement matters far more than chipset — mount the antenna outside any metal enclosure and as high as possible.
Will the same SIM card work in any of these modules?
Most use standard-size SIMs. The Callny G202 PLUS often ships expecting nano SIMs. All accept any active voice + SMS plan; no data is required. Cellular IoT SIMs designed for M2M devices work well — they tend to have no inactivity expiry.
Sources
Manufacturer documentation
2G/4G shutdown research
Related guides on this site
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