COVERAGE AND CALLING LOG
Yenra | Revised October 3, 2026
Guide: https://yenra.com/nationwide-wireless-calling/

Purpose: record ordinary-call observations at places that matter to you.
Use willing contacts and ordinary agreed numbers, never emergency numbers.
Test while stationary; a driver should concentrate on driving.
Keep private addresses and contact details in a protected copy.

SETUP
Phone exact model / OS:
Provider / exact plan / SIM or eSIM:
Compatibility confirmation and date:
Trial or return deadline / terms source:
Domestic roaming rules source / date:
Essential places and required services:

COPY THIS ENTRY FOR EACH PLACE AND TIME
Place or private location label:
Date / time / time zone:
Indoor or outdoor / stationary or passenger observation:
Map source / date / technology / modeled conditions:
Map prediction:
Wi-Fi on or off / Wi-Fi calling enabled or disabled:
Incoming ordinary call: completed? Both people heard complete sentences?
Outgoing ordinary call: completed? Both people heard complete sentences?
Text result (if required):
Small-page data result (if required):
Roaming indicator / other relevant settings:
Observed failure / exact message / support case reference:
Repeat observation at another time:
Settings restored after trial:
Unresolved issue / owner / next action:

DECISION
Essential tasks that passed under recorded conditions:
Essential tasks still unresolved:
Alternative needed (for example, dependence on home internet):
Plan/device terms reviewed:
Decision and reason:

Interpretation: a map is a modeled prediction. Record its assumptions.
A data test and a voice call answer different questions. One successful
trial is an observation under those conditions, not a coverage guarantee.
Sources:
https://help.bdc.fcc.gov/hc/en-us/articles/6047425308187-Formatting-Mobile-Broadband-Availability-Coverage-Maps
https://www.t-mobile.com/support/coverage/domestic-roaming-data/