Get unlimited data for $15/month for your first 12 months
Get any plan for $15/month for a limited time. New customers only
Cell Coverage in Parker Dam, California
See Deal
Unlimited priority data on Verizon for $30/mo
Save $5 off on the Visible+ plan for a limited time with code SUMMER
Not enough data for Parker Dam
Showing performance data for San Bernardino instead. We need at least 25 speed tests in Parker Dam to generate local metrics.
Performance by Carrier in San Bernardino
Compare real-world download speeds, upload performance, and latency for major carriers in San Bernardino — based on millions of crowdsourced speed tests to help you find the fastest, most reliable network.
DownDownload
79.3Mbps
UpUpload
7.1Mbps
Reliab.Reliability
6.2/ 10
Cov.Coverage
93.9%
Over 27,000 tests conducted
DownDownload
165.4Mbps
UpUpload
13.8Mbps
Reliab.Reliability
7.6/ 10
Cov.Coverage
36.5%
Over 23,000 tests conducted
DownDownload
109.8Mbps
UpUpload
15.4Mbps
Reliab.Reliability
8.3/ 10
Cov.Coverage
100.0%
Over 27,000 tests conducted
These results compare 3 mobile carriers measured in San Bernardino — AT&T, Verizon, T-Mobile — using median values calculated from crowdsourced speed tests. Each card shows download speed, upload speed, and reliability to give you a complete picture of real-world network performance.
T-Mobile delivers the fastest median download at 165.4 Mbps, making it the top performer for raw download throughput. Verizon leads in coverage, reaching 100.0% of the area based on FCC data. Verizon ranks highest for reliability with a score of 8.3/10, reflecting consistent connection quality across tests.
Network Performance
Based on crowdsourced speed tests and signal measurements in Parker Dam, California using data from San Bernardino, get a complete view of mobile performance with area-wide benchmarks and carrier-by-carrier breakdowns. Explore median performance metrics from real-world tests, then compare carriers side-by-side for speed, responsiveness, and availability.
Median Performance
Download
108.3Mbps
Upload
11.4Mbps
Latency
38ms
Reliability
7.0/ 10
Top Performers
Best Download: T-Mobile
165.4 Mbps
Best Upload: Verizon
15.4 Mbps
Best Latency: T-Mobile
35 ms
Best Reliability: Verizon
8.3 / 10
Best Coverage: Verizon
100.0%
Coverage Snapshot
5G90.7%
4G LTE100.0%
Based on over 78,000 speed tests
Network Performance aggregates all measured carriers in San Bernardino to provide a baseline view of typical speeds and latency in the area. Use these medians as a quick indicator of overall network quality.
Local testing in Parker Dam is limited, so these medians are based on data from San Bernardino. Current medians are 108.3 Mbps download, 11.4 Mbps upload, and 38 ms latency.
Cell Phone Plans for Parker Dam
Compare wireless plans from carriers with coverage in this area.
Recommended PlanSponsored
Mint Mobile 6GB Annual
12 month term
T-Mobile
$15/mo
Mint Mobile 6GB Annual
$15/mo
12 month term
T-Mobile
6 GB Data
Hotspot Included
Unlimited min
Unlimited texts
- 6 GB Datahigh-speed, then 128Kbps
- Hotspot Included
- Unlimited Minutes
- Unlimited Texts
Recommended PlanSponsored
US Mobile 5GB
Monthly plan
AT&T
T-Mobile
Verizon
$15/mo
US Mobile 5GB
$15/mo
Monthly plan
AT&T
T-Mobile
Verizon
5 GB Data
Hotspot Included
Unlimited min
Unlimited texts
Taxes & fees included
- 5 GB Datahigh-speed, then data stops
- Hotspot Included
- Unlimited Minutes
- Unlimited Texts
- Taxes & Fees Included
Recommended PlanSponsored
US Mobile Unlimited Starter Dark Star
Monthly plan
AT&T
$25/mo
US Mobile Unlimited Starter Dark Star
$25/mo
Monthly plan
AT&T
Unlimited Data
20 GB Hotspot
Unlimited min
Unlimited texts
Taxes & fees included
- Unlimited Datahigh-speed
- 20 GB Hotspot
- Unlimited Minutes
- Unlimited Texts
- Taxes & Fees Included
Recommended PlanSponsored
Visible Base
Monthly plan
Verizon
$25/mo
Visible Base
$25/mo
Monthly plan
Verizon
Unlimited Data
Unlimited Hotspot
Unlimited min
Unlimited texts
Taxes & fees included
- Unlimited Datahigh-speed
- Unlimited Hotspot
- Unlimited Minutes
- Unlimited Texts
- Taxes & Fees Included
Recommended PlanSponsored
Mint Mobile Unlimited Annual
12 month term
T-Mobile
$30/mo
Mint Mobile Unlimited Annual
$30/mo
12 month term
T-Mobile
Unlimited Data
20 GB Hotspot
Unlimited min
Unlimited texts
- Unlimited Datahigh-speed
- 20 GB Hotspot
- Unlimited Minutes
- Unlimited Texts
Limited-time offer
$15/mo first year
Recommended PlanSponsored
Visible+
Monthly plan
Verizon
$35/mo
Visible+
$35/mo
Monthly plan
Verizon
Unlimited Data
Unlimited Hotspot
Unlimited min
Unlimited texts
Taxes & fees included
- Unlimited Datahigh-speed
- Unlimited Hotspot
- Unlimited Minutes
- Unlimited Texts
- Taxes & Fees Included
Limited-time offer
$30/mo for 5 years with code 5OFF5
Page 1 of 46
Cell Coverage in Parker Dam: FAQ
What is the best cell phone carrier in Parker Dam?
Based on crowdsourced speed tests in San Bernardino, T-Mobile currently leads in median download speeds. Compare carriers in the performance table above for the latest results.
Why might this page show limited data for Parker Dam?
We need at least 25 recent speed tests to generate reliable local metrics. Until we reach that threshold in Parker Dam, we show performance data for San Bernardino when it is available.
What is the reliability score?
The reliability score summarizes how dependable mobile performance is in San Bernardino. It uses a 0.0 to 10.0 scale (higher is better) and is calculated from real-world speed test percentiles with weighted components: download (50%), latency (30%), and upload (20%). It evaluates the lower-end experience using the bottom 10%, 5%, and 1% percentiles when enough samples are available. If local speed testing is limited, a coverage-based fallback is used from signal quality distribution (great/good/poor).
How can I check coverage at my specific address in Parker Dam?
Use the interactive map to check signal strength at your exact address. Visit the CoverageMap interactive map to explore 4G/5G availability.
How can I contribute coverage data for Parker Dam?
Download the CoverageMap app and run a few speed tests with location enabled. Your results help improve coverage accuracy and unlock local rankings faster.
Get the app