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Re: texting and calling wont work when i have full bars
Go to security settings and to initial settings then to wipe phone and put in password or default as 1234 it will remoce everythign off of it so make sure you have a back up of your numbers and pics and stuff
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Your cellular carrier can provide you with a "signal booster" device that can repeat and boost a cellular signal you already get in your house. For example, if you consistently have one bar of coverage but no more at home, a booster can take that one bar and turn it into more bars. If you have one or two bars of coverage near a window but no coverage elsewhere in your home, a booster near that window can capture the signal and boost it, providing a strong signal throughout the rest of your home.
Some carriers offer such devices very inexpensively - $50 or maybe even free - especially if you're in an area where they know they know they have poor coverage. T-Mobile now offers such boosters for only a $25 deposit, which you can get back just by returning the booster to them.
Contact your carrier - or look at their website - to see just what they'll offer you and for how much.
Femtocells / Microcells
A femtocell - or "microcell" - is a small, low-power cellular base station that connects to the cellular network via your broadband Internet connection. Essentially, it's a small cellular signal tower that will provide a signal in and near your home, connecting to the larger mobile network over your Internet connection. This makes it ideal for situations where you don't even have a signal bar of coverage you can boost at home. The only "catch" is that your Internet connection must have a high enough download speed. Different carriers require different minimum speeds, but you should be fine as long as you have a solid broadband connection.
Ask your cellular carrier if they offer this sort of product and find out how much it will cost you. As with boosters and repeaters, a femtocell may be available at a steep discount from your carrier in areas they know they have poor cellular service.
You can also buy them easily on Amazon or almost any decent tech store - for instance the one pictured below works for AT&T and supports LTE (though it is a bit pricey), or you can get one that supports Verizon, T-Mobile, AT&T, Sprint, Cricket, and many others, but you won't get LTE support. Of course, since you likely have Wi-Fi in your house, LTE isn't really a big deal and the 3G will work just fine for calls and texts.
Editor's Note: For the official How-To Geek office we got a Samsung microcell device directly through Verizon, which wasn't cheap, and doesn't work all that well. And since it only works for Verizon, any of the people who come by who use other carriers have zero signal, which is really annoying. If we could do it over again, we'd have started with this zBoost microcell that supports virtually every cell provider and has many different models and options to choose from depending on the size of the house. They even have an optional antenna you can install on your roof to give cell coverage everywhere around your house. It's the best choice, and cheaper than most carriers will offer you.
Wi-Fi Calling and SMS
Wi-Fi calling is a feature you might remember from some years ago, but it's coming back with a vengeance. At the moment, in the US, only T-Mobile offers Wi-Fi calling for both Android phones and the iPhone. Sprint only offers Wi-Fi calling for select Android phones. AT&T and Verizon have announced plans to activate Wi-Fi calling in 2015.
Essentially, WI-Fi calling allows your smartphone to receive and place calls and communicate via text messages over a Wi-Fi network. Your home probably has Wi-Fi, so Wi-FI calling will let you use your existing wireless router instead of needing a new, specialized device. You can just improve your Wi-Fi signal strength, and all your devices will benefit!
Wi-Fi calling works transparently. When your phone is on Wi-Fi and has a poor cellular signal, it will connect to the Wi-Fi network and your phone calls and text will be sent and arrive over the Wi-Fi network. When you leave the Wi-Fi network, your phones and calls will be sent over the cellular network as usual. This is all designed to hand-off automatically, so you could start a phone call on your Wi-Fi network and your phone would automatically hand off to the cellular network as you walk out the door, with no interruptions.
WI-FI calling will also work on other WI-Fi networks, so it's helpful if you ever end up in another place where you have a poor cellular signal but have Wi-Fi. To use this, you'll need to ensure your phone has Wi-Fi calling support and that it's enabled. Android phones from T-Mobile and Sprint will often include this feature, so look up how to enable it on your specific model of Android phone.
The iPhone 6 has built-in Wi-Fi calling, although it currently only functions on T-Mobile. AT&T and Verizon plan to support it in 2015. To enable this feature on an iPhone, open the Settings screen, tap Phone, tap Wi-Fi Calling, and activate it.
WI-Fi calling seems to be the future goal the industry - T-Mobile, especially - is pushing towards. With Wi-Fi calling integrated into your phone, you don't need to buy a specialized device. Your home Wi-Fi router works. And, when you go somewhere else where you have a poor signal, all they need is a Wi-Fi network and you'll be able to get a phone calls and SMS messages through it.
Image Credit: Carl Lender on Flickr, Nan Palmero on Flickr, Wesley Fryer on Flickr
hi, the antena of the phone i.e your palm centro is bad that is why...you will need to change the antena before you can get signal, because without signal you can send text messages or make any calls..
Does it show signal bars on the screen and are you able to make/receive
calls? If not then that is why. AT&T does not guarantee in building
service. If you do have signal and it is working other than text, then
check your message center number in the device:
From the standby screen, press Menu.
Scroll to and select Settings.
Scroll to and select Text Message.
Enter appropriate Message Center Number, then press Done. The message
center number that should be there is +13123149810 (and the + sign does
need to be in front of it)
For video call to work, you have to be in a 3G covered area. This means that the icon over your signal level bar must be full and have 3G written in it. It wont work if it is running on a low 3G band (the signal bars must be full) a GSM band (a G logo above the bars) or HSDPA band ( a H logo above the bars).
I don't know why even though HSDPA is faster than 3G but the viewty will only allow video call to take place when 3G is available.
I've heard it can also be dependant on your service provider, as PAYG sim cards sometimes wont allow video calls.
This could be a problem of a weak or worn out battery. perhaps, the next time the problem persists, you could use the phones charger while making a text/call. another option is to check the battery terminals for dirt or other contaminants and clean accordingly. also, have you tried updating the PRL? this refers to the preferred roaming list. dont know why its called that, but it may update the software of the phone. do this by calling star 228, that is, the star button, then 228, then send. I worked in a verizon call center years ago and this is how the phone software was updated. good luck