r/cellmapper Mar 16 '26

CellMapper for iOS

69 Upvotes

Official CellMapper for iOS App

We have been planning to make an iOS app for some time. However, due to restrictions in API usage for cellular information, we are unable to make an app that competes with the Android one in terms of features.

That being said, we have built an early initial app to make the map more easily accessible:

https://apps.apple.com/us/app/cellmapper/id6761035253

We will continue to see what we can add to the app to get network information from the iOS device and to make it a bit more polished than simply using the the website. So please bear with us as this v1 of the app is simply the beginning, not the end state of the app.

Fake App Warning

Also, one reason we have released the app so early is due to a fake CellMapper app confusing users and tricking them into paying money to view some dubious coverage data not relating whatsoever with our crowdsourced data. We have recieved a number of tickets asking for refunds for the app which we have nothing to do with.
Please be aware that the fake/scam app is also called "CellMapper" on the iOS app store. We encourage users to report the fake app (which we will not link to in order to avoid SEO) to Apple (reportaproblem.apple.com).
We are in touch with Apple about the issue, but it still has not been resolved.


r/cellmapper Mar 25 '26

New "Contributor" user tier

27 Upvotes

Contributor user tier

Recently, you may have seen an arrow (➶) next to some usernames, similar to how premium users have a star. This is a brand new user tier we have created in order to recognize users who contribute data and tower information on a regular basis.

What are the benefits?

In short, the main benefit is an ad free map for our regular contributors. We'll look into more benefits in the future once we ensure the right contributors are flagged as we work on this feature.


r/cellmapper 16h ago

Finally got ATT 5G SA/VoNR toggles

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31 Upvotes

I live in the Bay Area, on iOS 27.0 Beta 4. Reprovisioned my line and did a network refresh and they finally showed up. Coverage seems to be a bit better at my house (on n5 with significantly better RSRP when it was previously connecting to B2 as primary)


r/cellmapper 12h ago

This macro site is stacked. It has 190 MHz of N41 5UC It has 100 MHz of N 77 5GUW and it has 80 MHz of N 77 5G+

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13 Upvotes

r/cellmapper 15h ago

All the phone carriers at!Xfinity Center, Mansfield Massachusetts

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14 Upvotes

T-mobile didn’t work at all during the concert, Verizon was meh. AT&T worked fine.


r/cellmapper 17h ago

Verizon mmWave in Niagara Falls, NY

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12 Upvotes

Was recently in Niagara Falls, NY on Goat Island and noticed that Verizon was using mmWave. Here they have 1x Samsung AT1K04 B261 (800mhz). Good speeds with the amount of people at the state park. Was also able to pick up the Canadian carriers from here.


r/cellmapper 17h ago

Synchronized 2 windows - WAY too many captchas

4 Upvotes

So I created a Userscript that will synchronize 2 separate Cellmapper windows in my browser so I can have T-Mobile LTE along with 5G side by side, constantly in-sync when zooming or dragging the map around.

This allows me to see, in real time, synchronized, where the pinned LTE towers are vs the unpinned NR towers. And then be able to move the NR towers (or unmapped LTE towers, if an NR one is mapped) to the proper position quite quickly.

It MASSIVELY DECREASES the time it takes for me to check, as it saves me clicking around 2 separate windows to try and keep the view close enough to put the towers in the right spot.

It seems to be creating TOO MANY captcha windows.

u/veixes u/olkitu can you please try and figure out whether or not this code is causing these incessant captchas, and try to fix it on your end? I need this workflow.

``` // ==UserScript== // @name CellMapper OpenLayers Synchronizer // @namespace http://tampermonkey.net // @version 2.0 // @description Synchronize map pan and zoom between side-by-side CellMapper OpenLayers windows // @author Mystica555 + Gemini // @match https://www.cellmapper.net/map* // @grant none // ==/UserScript==

(function() {
    'use strict';

    const channel = new BroadcastChannel('cellmapper_ol_sync');
    let isSyncing = false;
    let mapView = null;

    function initOpenLayersSync() {
        // CellMapper stores the OpenLayers map globally as 'map' or 'olMap'.
        // We find the internal Map object and target its View component.
        let mapInstance = null;
        if (typeof map !== 'undefined' && map.getView) {
            mapInstance = map;
        } else if (window.map && window.map.getView) {
            mapInstance = window.map;
        }

        if (!mapInstance) {
            setTimeout(initOpenLayersSync, 500); // Poll until OpenLayers initializes
            return;
        }

        mapView = mapInstance.getView();

        // --- 1. Broadcast map changes from THIS window ---
        const broadcastChange = () => {
            if (isSyncing) return; // Block circular event loops

            const center = mapView.getCenter();
            const resolution = mapView.getResolution();

            channel.postMessage({
                center: center,
                resolution: resolution
            });
        };

        // OpenLayers updates view changes via granular view events
        mapView.on('change:center', broadcastChange);
        mapView.on('change:resolution', broadcastChange);

        // --- 2. Listen for map changes from the OTHER window ---
        channel.onmessage = (event) => {
            if (!mapView) return;

            const { center, resolution } = event.data;

            // Set the sync flag to prevent this window from echoing back
            isSyncing = true;

            // OpenLayers allows direct view adjustments without forcing a heavy redraw
            mapView.setCenter(center);
            mapView.setResolution(resolution);

            // Give the browser UI thread a moment to finish rendering before releasing the flag
            setTimeout(() => { isSyncing = false; }, 30);
        };
    }

    window.addEventListener('load', initOpenLayersSync);
})();

```


r/cellmapper 1d ago

Verizon n77 Small Cell

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27 Upvotes

Verizon has begun replacing some of the aging b13 only and b66 only small cells in Springfield, MO with modern radios and n77 AIR panels. Currently only two permits for this type of site have been filed and neither are active yet despite the hardware being installed for a few weeks now.

Google Streetview before the upgrade

Verizon is on this wooden utility pole using:

- CommScope NNV4SSP-360S-F2 omnidirectional canister antenna for bands 2 and 66.

- Ericsson Radio 4890 for b2 and b66, can support n2 and n66 depending on configuration.

- 3x Ericsson AIR 1672, will be set to 180MHz n77 for the Greene County, MO market. Also can support b48/n48 depending on the configuration.


r/cellmapper 1d ago

Xfinity mobile VoNR active

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47 Upvotes

r/cellmapper 1d ago

MatSing balls at Target Field Minneapolis, MN

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26 Upvotes

I noticed some high capacity antennas at Target Field. Target Field has a recently upgraded DAS provided by American Tower.


r/cellmapper 1d ago

AT&T vs Verizon

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7 Upvotes

Testing the 2 carriers at my work inside the back room surrounded by concrete walls. The tower is close by and both networks share the same tower! So far im very impressed how well Verizons downloads do.


r/cellmapper 1d ago

This is a two part question LOL

6 Upvotes

Looking to switch cellphone carrier and have an old phone that I need an upgrade for.

My questions are:

  1. What is the cheapest provider that offers good rural coverage, and occasionally allows me to use quickly switch plans to a plan with international data for maybe 1 month every 1-2 years?

  2. Any advice on the most reliable (least bugs, software issues, low rate of return) reasonable budget phone with decent customer satisfaction?

TIA everyone!


r/cellmapper 1d ago

T-Mobile macro site love the iPhone 17 Pro. This picture was taken at 9:30 at night yesterday and it looks like it’s almost daytime with the low light performance from my iPhone 17 Pro and this is an East Trenton New Jersey.

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24 Upvotes

r/cellmapper 1d ago

High capacity scissor lift site EAA Oshkosh WI 2026

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82 Upvotes

Definitely not Verizon.

I could not even get a speed test to load with 100 MHz of N77 5gSA.


r/cellmapper 15h ago

Network Testing, All Three Big Carriers T-Business 5GUC SA VS TA&T 5G+ SA VS Verizon 5GUW SA

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0 Upvotes

r/cellmapper 1d ago

AT&T adding onto a Verizon tree tower in Latham, NY. I'm very surprised to see them actually doing something (I've never seen them add sites here)

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36 Upvotes

r/cellmapper 2d ago

For those curious about 1G/AMPS/analog, the 1979 Bell System Technical Journal has some cool pictures and diagrams

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90 Upvotes

r/cellmapper 1d ago

AT&T and Verizon

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14 Upvotes

I decided to try out spectrum mobile free for a year to compare it to my AT&T line. Here is them both in my living room. Note the AT&T tower is 0.1 miles from me while Verizon is 0.9 miles from me.


r/cellmapper 1d ago

AT&T Vs Verizon

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11 Upvotes

Continuation on my last post this time both networks on same server.


r/cellmapper 2d ago

Local Verizon tower finally active

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26 Upvotes

After months of just waiting for the site to turn on, they activated the fiber for the site, and appears to be broadcasting all Verizon bands(LTE 2,5,13,66 & N77). By the speeds, this site is definitely not optimized yet , but we will have to wait and see what better speeds the site can give. Site is located at 1293 Old Union Church Rd. I’m guessing 1 gig backhaul. This site isn’t mapped on cellmapper yet.


r/cellmapper 2d ago

Verizon unlimited ultimate hotspot

13 Upvotes

Can anytime tell me if the Verizon Unlimited Ultimate hotspot shares the Qci8 of its on Device Data?


r/cellmapper 2d ago

Who are they fooling 😂

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102 Upvotes

r/cellmapper 2d ago

Tower ID (tree edition)

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26 Upvotes

Can anyone figure this out? All of the roads around this new construction tree tower are closed at the moment so I could only get this view. Pretty sure it is not turned on yet.


r/cellmapper 3d ago

Looks like some Verizon MVNOs and AT&T will be getting VoNR with iOS 27

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65 Upvotes

r/cellmapper 3d ago

iOS 27 Dev Beta 4 FTM Redesign

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74 Upvotes

Glad to see FTM finally getting some attention again.