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Cell Phone Coverage Map in Diamond Bar, CA - By Reception Rating

Cell phone coverage comments are submitted voluntarily by visitors around the Diamond Bar, CA area.

Carrier	Avg Rating	No. of Comments	Towers	Coverage Map
1. Sprint	3	4	Sprint Towers	Map
2. AT&T	2.5	2	AT&T Towers	Map
3. Verizon	0.5	2	Verizon Towers	Map

Coverage comments are sorted by date. Users can sort by Carrier, City, Zip Code, Reception Rating, or Date by clicking on the header below. To search by zip code, use the search box to the right.

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Comments

Towers

Carrier / Rating	Location / Comment	Date

Sprint 5 Out of 5 Phone Model: Sanyo RL 2500	Grand Ave. / Diamond Bar Blvd., Diamond Bar, CA 91765	Wed Feb 15, 2006
	VERY GOOD RECEPTION - that's because of the combination of Sprint service and a Sanyo cell phone. Sprint has great service almost everywhere except San Dimas and Sanyo phones are VERY good quality when it comes to receiving reception and clear calls!

AT&T 5 Out of 5 Phone Model: Samsung SGH-S307	Diamond Bar Blvd. / Golden Spring / Sylvan Glen, Diamond Bar, CA 91765	Fri Mar 18, 2005
	Last OCT 2004, I got ZERO reception at my home. For the last 3 months I have to call from outside of my home. But after AT&T join with Cingular,..PERFECT but you must change the Cingular sim card from 32k to 64k..then..volla! Full bar! Excellent! However, since AT&T and Cingular barely join together, the changing carrier from AT&T to Cingular has a dead zone spot. But after that, back to full bar. Anyway, I love my Cingular now. T-Mobile over this area suck too. Zero reception!

Sprint 5 Out of 5 Phone Model: Samsung SPH-A500	Diamond Bar Blvd. / Grand, Diamond Bar, CA 91765	Mon Mar 15, 2004
	This seems to be a tough area for some carriers (I just saw someone report AT&T problems here). But Sprint is working solid at this intersection now.

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Sprint 1 Out of 5 Phone Model: HTC Evo 4G	Diamond Bar Blvd. / Grand Ave., Diamond Bar, CA 91765	Thu Oct 14, 2010
	neighborhood behind ralph's (monument canyon drive) market is Sprint dead zone, 1 bar at most, no 4g, 3g is extremely slow (350 down, 120 up). T-Mo cell phone has strong signal since 2008, haven't tested data speeds. Verizon appears to be okay as well based on mobile broadband bars on laptop stick. Again, this is the neighborhood surrounded by HILLS behind the Ralph's store and not necessarily the DB / Grand intersection itself.

Sprint 1 Out of 5 Phone Model: Samsung SPH-M520	Pantera Dr. / Bowcreek Dr., Diamond Bar, CA 91765	Sat Jan 24, 2009
	I have been walking the same route for several years, and have never had a problem with reception until a couple of weeks ago. Now I can't get a decent signal at all. The only thing that has changed is a new cell tower that was recently built at Pantera Park. Who operates this tower? I know it is not Sprint, but am wondering if it is affecting my signal?

Verizon 1 Out of 5 Phone Model: LG VX855V01	Diamond Bar Center / Grand / Summitridge / Longview, Diamond Bar, CA 91765	Mon Jul 14, 2008
	I have lived here for three years and some days are better than others. I live at the top of the hill so maybe that is why I could give it a score of 1 instead of 0. Basically if you even can receive or make a call, it doesn't stay connected long. Also, on Longview, there is absolutely no reception and if you turn left out towards Chino Hills you don't get any until you get up the hill past the cow field.

AT&T Wireless (TDMA) 1 Out of 5 Phone Model: Motorola V60	Diamond Bar Blvd / Grand, Diamond Bar, CA 91765	Fri Feb 06, 2004
	I have never gotten good reception in Diamond Bar, especially in the center of town. With my Motorolla V60, I get a "no service" indication at Grand and D-Bar Blvd. Don't get ATT if you live here.

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Verizon 0 Out of 5 Phone Model: Motorola V60s	Entrance To Diamond Canyon Community / Brea Canyon Cutoff and S.Diamond Canyon Rd., Diamond Bar, CA 91765	Mon Oct 30, 2006
	No Reception at all anywhere within the development. Could be caused by proximity to Hills nearby. The houses are built at the foot of the hills.

AT&T Wireless (GSM) 0 Out of 5 Phone Model: Nokia 8390	Grand Ave / Diamond Bar, Diamond Bar, CA 91765	Sun Mar 14, 2004
	Everyone seems to be switching companies. We have never had good reception even when we had TDMA phones. With so many users in this area I would think AT&T Wireless would do something.

AT&T 0 Out of 5 Phone Model: Sony Ericsson T610	Deepsprings Dr / Armitos, Diamond Bar, CA 91765	Thu Jan 22, 2004
	No reception at all. Avoid Cingular in Diamond Bar area. They are almost useless unless you live close to Freeway 60.

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Carrier:	Alltel AT&T (Cingular) Cellular One Cricket MetroPCS Nextel Qwest Sprint T-Mobile US Cellular Verizon Wireless Virgin Mobile	Select which network you wish to comment on.
Phone Model:		Enter the phone used to test reception.
Zip Code:		Enter zip code of reception review location.
Location or Major Street:		Enter location of reception review. (ie: Landmark, building, major roads, etc)
Major Street 2: (For intersections)		If at intersection enter the major cross streets in Street 1 and Street 2. Otherwise enter in Street 1 and leave Street 2 blank.
Reception Rating:	5 - Perfect 4 - Good 3 - Average 2 - Below Average 1 - Poor 0 - No Reception	How many bars of reception do you get? (Out of 5)
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Cell Phone Coverage Map in Diamond Bar, CA - By Reception Rating

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