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hey guys. this is andrew esquivel here backwith another review/tutorial/informational video for you.today, we are going to be talkingabout external antennas and how they go along with your cell phones like the galaxy s4.now, there’s a lot to go over and there’s a lot of very important information you reallyneed to know before you even consider one of these. so, if you’re going to bear withme here, you’re going to learn a lot.first off, not every galaxy s4 is the same. forinstance, over here, i have a t mobile galaxy s4. now, the ports that we use to connectthe antenna to are this little guy right here and this little guy down here. now, one thingto note, r1 is what’s labeled for up here, that’s supposed to be for 3g connectionsand l1 is supposed to be for 4g connections.

i have seen documentation stating that it’sdifferent for different versions of the phone and over here, we have a sprint galaxy s3tri-band, notice there is only of these ports and r1 is down here instead of up here. so,there are different ways the phone communicates with the antenna. in a tri-band version, r1is the connection that you would use to connect your antenna for 4g connections. so, thingswork a little differently across manufacturers. another thing to note and i want to make sureyou all know this before you do anything is these little adaptors have tiny little metalpins inside of them that connect to these r1 and l1 ports. now, if for whatever reason,you plug those connections in too deeply or you, for some reason, used your own wire totry and make your own antenna, you stick it

there, you could permanently damage your phone.there’s a connection in here that will cut off the connection from the internal antennain order to make a connection with the external antenna and if you push in too hard, you’llbreak that connection and only be able to use external antennas for the rest of yourphone’s life.now, i’ve seen documentation stating other ways that the phone deals withinternal and external antennas. one way was suggesting that the phone simply chooses betweeninternal or external antennas based on which antenna was getting a better signal. i haveused this for a little bit now and i’ve been doing a lot of experimentation. we willget to this eventually but you got to be super careful. these connections are not super secure.you don’t want to move them so that they’re

tilting in any manner. you want to be verygentle with them. if you screw up, there’s really not much you can do other than takingoff all the plates and there are points in here where you can resolder the connectionif you’re feeling like being a technician on your phone. i’ve also read that usingthese may void your warranty. there’s a lot of mishmashed information on the internetabout this concept and even go so far to suggest that these ports were only designed for samsungto test the internal antennas. so, information is very hard to figure out.i am going to attemptto clear as much of that as possible. even though these ports were designed for samsungto test the antennas, supposedly they’re also there in case you want to use externalantennas. the external antenna concept is

simply trying to get a better signal especiallyin rural areas or increasing your upload and download speed on your network by gettinga better signal, instead of four bars, now you get five.we’re going to go over that with it connected and you’re going to see the difference betweenthe internal and the external antennas. so, what we’re going to be doing is we’reusing the galaxy s4 from t mobile instead of the sprint, so we’re going to take sprintand put it on this side over here and first off, we need to start the phone up becausewe need to get some benchmarks, some differences. we need to know what kind of signal we’regetting from the phone without the antennas in the first place in order to see if it’seven worth having the antenna because these

things are big and bulky, you don’t carrythem with you. they’re actually magnetic on the bottom, so they’re designed for youto stick on the top of your car and i have driven with this on the top of my car, i wasgoing about 45 miles an hour or so and this little bending point is also there so youcan stick it on the wall somewhere that has a metal plating like a door or something likethat and get you long distance because in theory, this antenna is super long, you canput it somewhere wherever you get a better signal than where you’re sitting, but anywho,now that we’ve got the phone started up, let’s go ahead and open under my applicationshere for testing network signal. now, we’re not going to get into much technical detailbut let’s take a look at the meter here.

now, we’ll get this number right here thatsays that is over dbm, long story short, the smaller that number is or the closer to zerobecause it’s all negative, so the smaller that number is, the better your signal is.right now, it’s at about 110 but i’ve seen it go as far down as to 105 in my area.now, signal strength is purely circumstantial. you can have a great signal at one spot ofyour house and a terrible signal on the other spot or it could be across town what haveyou, so we’re going to try and do everything from this spot right here and make sure it’sas reliable and accurate information as possible, so okay, 19 dbm. next, we’re going to speedtestby ookla and we’re going to see what speeds we can get with this signal. so, i’m goingto choose my own server and we’re going

to begin the test. so we have an average ofdownload of 15.33 mbit/s, remember there’s 8 bits in a byte, so 8 mbit on a megabyteas well and 3.96 mbit/s upward. so with that being said, we now have our benchmark. now,what we’re going to do is plug the external antennas in and see what difference we getand i don’t believe you should have to turn the phone off to plug it in but i’m goingto do it anyway just so you get a clean slate for this test.okay, so we have the phone connectedinto the l1 port and you’ll notice that it only connected one of the connections intothe l1 port. the reason for that is, i don’t believe you were supposed to have two connectionson this antenna at the same time despite the fact that it came with it, i’ve noticedthrough my own trial and error that connecting

only one of the connections to l1 seems toyield better results. however, we’re going to attach one by itself, both at the sametime, and one in the r1 port instead of the l1 port. so let’s turn on the phone, goback to the same application we’re using before for signal strength and we’re goingto compare to what we have before. so looking at it here, we have got 109 dbm which is moreor less around the spot, 110 and no matter what, that is going to fluctuate a littlebit.that’s just how it is when you’re dealing with cell networks because wirelesstechnology can be affected by so many things, the distance from the your cell tower, howmany people are active on that cell tower, the rooms around you, what are the walls aremade of, etc. so like i said, everything is

very circumstantial. so you see our signalstrength is about the same and we’re going to go back over to ookla speedtest and we’regoing to make sure i select the same server, so we go into settings, change server, andyup i have the same server, so we’re going to begin the test. the test is done, we averaged7.77 mbit/s down 2.59 mbit/s up. that makes you question why you even use an externalantenna and like i said it’s kind of weird because we’re not really sure how the antennasinteract with the phone. is there a switch somewhere that i can go on the settings tochange it? i don’t know; but someone said there was but never provided any informationon how to do it, someone says it’s an automatic switch, and some say it’s going to choosethe best of the two signals. now, what we’re

going to do is, for the sake of curiosity,we’re going to connect the 2nd fme connection into the r1 port and we’re going to seehow that affects the phone.so, we’re going to go back to our network decibel meter hereand as you can see, we’re still around the same. i mean, i can take the antenna and moveit around and it doesn’t seem to do much. these connections at the back don’t stayin very well so i kind of keep my fingers place on it just gently so that they don’tfall out and we’re going to try another speed test with both of these connectionsin. so this time, we averaged 10.26 mbit/s download and 0.43 mbit/s upload. that’sinteresting results to say the least.now, let’s do the final test where we take thel1 connection out, keep the r1 connection

in and we’ll go back to our network. sowe’re still around right there and we’re going to do one more speed test. this is withthe r1 connection only. so, our download this time was 12.27 mbit/s and our upload was 5.17mbit/s.so what does that tell us? it tells us that you might as well just stick to theinternal antenna. based on the performance that i’ve seen, there doesn’t appear tobe any particular gains. now that being said, i have been using this antenna all day, everywherefrom inside my car driving around checking signals as i drive around and i’ve usedit in my house in various places. there was a point where i was downloading somethingand i was tethering to my computer, downloading a video game via steam and when i connectedthe antenna, my speed has almost doubled,

when i disconnected it, it would go back down,but then i do controlled tests like this and you can’t notice much of difference, solong story short, it could be the antenna. maybe this antenna is just not that great.there are other antennas you can get to work with this connection and i’ll show you becausethese two connectors right here go into this antenna like this. i believe it’s a coaxtype cable and you can change out the antenna with a different one. there’s one from,i think it’s called wilson electronics, could be wrong. they also make an antennaalong with the same frequency bands as this and another thing to know is maybe gsm andcdma phones, their frequencies work better with this antenna than the other version,who knows? i only have t mobile to test it

with.the sprint phone is here just becausewe have one lying around. we don’t have sprint service unfortunately so there’sno way to test that. so it could be the antenna, it could be the phone itself versus this phoneitself, who knows?the fact of the matter is, you’re risking damaging your phone for thisconcept and for that reason, i really can’t, in all honesty, recommend doing this. withsuch scattered information out there and no real explanation as to what everything doesand how it does it. i mean, it’s 45 bucks for this antenna and it’s like a few hundreddollars for your phone. do you really want to risk it? if so, i’d love to see someoneuse the wilson electronics antenna and make a video of that just to see how it stacksup but until then, this is pretty much it.

there’s not much else to talk about. we’vetested everything we can. with that being said guys thanks for watching. i hope it wasinformative. hopefully, this answers a few questions that people run into and as always,i will see you next time. don’t forget to comment, rate, subscribe, share to your friends,check out my other videos, we got plenty of them and happy new year.