Free tools
Free Wireless Tools
Seven working tools and three reference tables. Look up any US carrier’s transfer PIN and account number, check an IMEI before a device swap, size the data plan you actually need, and find out which network a carrier runs on. All free, no signup, and nothing you type is stored.
Working tools
CoverageCoverage map by carrierNearly every brand rents one of three networks. Type a carrier and find out which one, then open that network’s official map and check your own address against the FCC’s independent map.Check a carrier
DatabaseCarrier and network databaseEvery US carrier with the network each one runs on, plus the porting instructions for every brand. 57 on Verizon, 48 on T-Mobile, 31 on AT&T, 8 on more than one, 26 on their own towers.Browse all 231
Device swapWill this phone work on my line?Validate an IMEI, find out whether a phone still works on US networks after the 3G shutdowns, and get a straight answer on whether swapping the device will change the plan. Text, email or print the answer.Check a phone
DataMobile data calculatorMove six sliders and see what your habits actually cost in gigabytes a month, priced off published rates from Netflix, Spotify, Zoom and the HTTP Archive. Then get the plan size that covers it with headroom.Open the calculator
APNAccess point name settingsWhat an APN is, when a phone needs one set by hand, and the settings for each network type.Open the APN tables
SprintSprint UICC matrixEvery Sprint SIM part number with its SKU, UPC, form factor and replacement — 57 in all, searchable. Sprint’s network is gone, but these part numbers are still looked up every week.Open the matrix
Reference tables
Explainers that answer the questions that come up at a counter every day.
SizesSIM card sizesStandard, micro, nano and embedded, with the dimensions and what fits what.See the sizes
ActivationHow to activate a phoneThe activation path for each network, and what to have ready before you start.Read the guide
Use these in your store
No permission needed and no licence to sign. Bookmark them, link to them from your own site, put them on the tablet at the counter, print them, text the link to a customer. If it helps you close a switch faster, use it.
Both the port-out lookup and the coverage tool put the carrier in the web address, so you can send a customer straight to their own answer instead of telling them where to click.
Transfer PIN lookup · Coverage by carrier · Every US carrier
Need a tool that is not here?
If you work a counter and there is a question you answer over and over with no good reference to point at, tell us what it is. That is where every tool on this page came from.
Managed by M. Curtis McCoy · Last reviewed September 21, 2026 · How we make money
The data behind these tools — free to download, free to reuse with credit.