Related
Hello guys i'm from toronto i recently came from new york and purchased a vibrant when returning I am unable to use it. I called t mobile and they told me i need to find my recite or a person with a t mobile account to get the unlock code for me. Unfortunatly my recite is left in some garbage in new york somewhere. Can anyone here help me? I have my Imei number
ireiricky said:
Hello guys i'm from toronto i recently came from new york and purchased a vibrant when returning I am unable to use it. I called t mobile and they told me i need to find my recite or a person with a t mobile account to get the unlock code for me. Unfortunatly my recite is left in some garbage in new york somewhere. Can anyone here help me? I have my Imei number
Click to expand...
Click to collapse
There is no reason for it to be locked other than its a stolen phone
Sent from my SGH-T959 using XDA App
ireiricky said:
Hello guys i'm from toronto i recently came from new york and purchased a vibrant when returning I am unable to use it. I called t mobile and they told me i need to find my recite or a person with a t mobile account to get the unlock code for me. Unfortunatly my recite is left in some garbage in new york somewhere. Can anyone here help me? I have my Imei number
Click to expand...
Click to collapse
A, total bs, you really did not think of the fact that a phone from the states would not work in canada? Bull**** you just want someone to get the unlock code for you because you bought the phone not knowing it would not work and are screwed now.
Yes i know stupid mistaek
I bought the american version because the canadian version could not work on my carrier Mobilicity. Most mobilicity phones come unlocked and i thought that because they used the same frequencies that T mobile would too. Yes i know stupid mistake should have done it in america. And it's not stolen
itsjusttim said:
There is no reason for it to be locked other than its a stolen phone
Sent from my SGH-T959 using XDA App
Click to expand...
Click to collapse
ionic7 said:
A, total bs, you really did not think of the fact that a phone from the states would not work in canada? Bull**** you just want someone to get the unlock code for you because you bought the phone not knowing it would not work and are screwed now.
Click to expand...
Click to collapse
Seriously you two should NOT give answers if you do not know wtf you are talking about. ALL t-mobile Vibrants are sim locked ie you cannot use it in any other country (ie with other carriers, even tmobile outside the US) but the united states and even here you cannot use it with any other carrier except t-mobile. I am about to call tmobile and have mine unlocked too so I can use it in Canada and Europe.
I usually buy t-mobile sim cards in Europe but I need my phone unlocked to be able to do that. But I will admit, since the Vibrant is pretty much the same as all the other Galaxy S phones, I also thought it could be used everywhere Tmobile was available (sans the simlock).
To the OP, go to Ebay if tmobile cannot help you, there are many companies that will unlock your phone for you for a fee. Or you can use the unlock generator from this site (but there have been mixed results with that). But even with the phone unlocked, does not mean it will get all the ranges oversees as it does here. Tmobile uses different Hz oversees than they do in the states so you may not get 3G (not sure, just using my experiences from other phones), so you may wanna check on that before going through all the effort of unlocking etc etc. You may be better off with a i9000 in Canada if thats your primary residence.
kponti said:
Seriously you two should NOT give answers if you do not know wtf you are talking about. ALL t-mobile Vibrants are sim locked ie you cannot use it in any other country (ie with other carriers, even tmobile outside the US) but the united states and even here you cannot use it with any other carrier except t-mobile. I am about to call tmobile and have mine unlocked too so I can use it in Canada and Europe.
I usually buy t-mobile sim cards in Europe but I need my phone unlocked to be able to do that. But I will admit, since the Vibrant is pretty much the same as all the other Galaxy S phones, I also thought it could be used everywhere Tmobile was available (sans the simlock).
To the OP, go to Ebay if tmobile cannot help you, there are many companies that will unlock your phone for you for a fee. Or you can use the unlock generator from this site (but there have been mixed results with that). But even with the phone unlocked, does not mean it will get all the ranges oversees as it does here. Tmobile uses different Hz oversees than they do in the states so you may not get 3G (not sure, just using my experiences from other phones), so you may wanna check on that before going through all the effort of unlocking etc etc. You may be better off with a i9000 in Canada if thats your primary residence.
Click to expand...
Click to collapse
Thanks for the help o will look into both those methods you stated
go to Market, and look for SGS Unlock, if the free version can not generate the unlock code, go for the Pro version.. or you could do it yourself for free by following instructions here:
http://forum.xda-developers.com/showthread.php?t=822008
kponti said:
Seriously you two should NOT give answers if you do not know wtf you are talking about. ALL t-mobile Vibrants are sim locked ie you cannot use it in any other country (ie with other carriers, even tmobile outside the US) but the united states and even here you cannot use it with any other carrier except t-mobile. I am about to call tmobile and have mine unlocked too so I can use it in Canada and Europe.
I usually buy t-mobile sim cards in Europe but I need my phone unlocked to be able to do that. But I will admit, since the Vibrant is pretty much the same as all the other Galaxy S phones, I also thought it could be used everywhere Tmobile was available (sans the simlock).
To the OP, go to Ebay if tmobile cannot help you, there are many companies that will unlock your phone for you for a fee. Or you can use the unlock generator from this site (but there have been mixed results with that). But even with the phone unlocked, does not mean it will get all the ranges oversees as it does here. Tmobile uses different Hz oversees than they do in the states so you may not get 3G (not sure, just using my experiences from other phones), so you may wanna check on that before going through all the effort of unlocking etc etc. You may be better off with a i9000 in Canada if thats your primary residence.
Click to expand...
Click to collapse
I know all american vibrants are locked thats why it is stupid for him to buy one to take back to canada with out an unlock code ready...
ionic7 said:
I know all american vibrants are locked thats why it is stupid for him to buy one to take back to canada with out an unlock code ready...
Click to expand...
Click to collapse
Maybe he didn't know? Maybe he forgot? Don't call people stupid for THINGS everyone does wrong everyday.
if anyone knows of a site that will sell unlock codes online please comment. I live outside the US and want to buy this phone online but will need an unlock code.
I have already contacted some sites but they don't have an idea yet if/when they will get them
EDIT: supposedly swiftunlock.net and gsmliberty.net work, but no proof yet rather than words from users.
EDIT: pictures of atrix running under Bell operator unlocked
EDIT: most users report that cellunlock.net work, 40$ but with a 50% discount using the android50 code.
To find your IMEI, type *#06#
search“Atrix unlock" on google
Im also interested in unlock codes but please serious sites.
Hi Guys, I believe the Atrix will come unlocked. It is a world phone which I think means you will be able to insert a SIM card from over seas and it will work. Also I have heard that if you buy the phone and call ATT and tell them you are going over seas to use it they will give you the unlock code. But then again these are things that I have heard and wont be able to verify until I get my Atrix in the mail.
no phone from a carrier sells unlocked. i already tried att twitter account to get an unlock code but got a friendly no. maybe if i buy it a month later i could call att from venezuela with gmail to try and score an unlock code.
i have seen lots of sites:
mobileunlocked.co.uk supposedly sells it at 15$
unlockitnow.com supposedly has it too.
gsmliberty.net at 10$.
globalunlock.com seems serious and admitted they don't have it.
For the over seas thing to work with att you needed to have been in contract with them on that phone for 6 months or something
franciscojavierleon said:
no phone from a carrier sells unlocked.
Click to expand...
Click to collapse
In central europe 95% of the cariers only give you unlocked phones .
And on top of that you can use almosst every phone with every carrier.
Pommes_Schranke said:
In central europe 95% of the cariers only give you unlocked phones .
And on top of that you can use almosst every phone with every carrier.
Click to expand...
Click to collapse
sorry, meant to say US carriers
If anyones used one of these unlocking service please respond back.
I'm curious if i'll be able to unlock right away.
Berserk87 said:
If anyones used one of these unlocking service please respond back.
I'm curious if i'll be able to unlock right away.
Click to expand...
Click to collapse
mobileunlocked.co.uk told me that all motorola codes are either 8 or 16 numbers and just rely on the IMEI and not the specific model.
find it on ebay
I'd also love to see this baby unlocked. I traveling to the US in 1 month and expect to buy one.......I'm crossing my fingers until then hoping for someone that guarantees to have an unlocked atrix
kidqian said:
find it on ebay
Click to expand...
Click to collapse
748$ on ebay, no thanks. And sadly, with my venezuelan credit card i need to buy the phone on a site that allows me to ship to a different address than on my credit card's billing address.
That leaves only amazon i think, but i may be wrong. If people know of other sites i would like to hear about them
unlockitnow.com just answered my email saying that they are selling the unlock codes right now. don't know if they are trustworthy
drock212 said:
Hi Guys, I believe the Atrix will come unlocked. It is a world phone which I think means you will be able to insert a SIM card from over seas and it will work. Also I have heard that if you buy the phone and call ATT and tell them you are going over seas to use it they will give you the unlock code. But then again these are things that I have heard and wont be able to verify until I get my Atrix in the mail.
Click to expand...
Click to collapse
This is completely incorrect. An AT&T world phone merely allows you to use the phone with an AT&T SIM outside the country at exorbitant rates.
Please don't post your guesses or misinformation, it only confuses people who are in need of help & then gets parroted elsewhere to other sites.
Ok, starting to freak out a bit here as a friend will buy the phone and bring it back to Germany for me this week; is there a risk that there might not be a way to remove the sim lock from the phone? I mean, all phones are eventually unlocked, aren't they? Even a guy at one AT&T shop I called on Saturday said that it shouldn't be a problem, just to go one of all the companies that are providing unlock keys on the web.
Don't want to be stuck with an unusable 400-500 $ brick..
according to the info i am handling motorola's phones are one of the easiest to unlock. if you are that desperate try the links i have posted and write to them.
i have posted a link on the pricing thread that lists the phone at 550$ unlocked over at mobilecityonline.com
http://www.mobilecityonline.com/wir...ganic&utm_term=AtrixATTU&utm_campaign=froogle
perdurabo2 said:
This is completely incorrect. An AT&T world phone merely allows you to use the phone with an AT&T SIM outside the country at exorbitant rates.
Click to expand...
Click to collapse
Well...that's not quite right. Because AT&T uses GSM tech, if you can unlock the phone, you absolutely can take out the AT&T SIM and swap it for a local one. I do it all the time when I travel: I buy a (local to where I happen to be) rechargeable SIM and I pay local rates rather than getting gouged by AT&T.
You must unlock the phone to do that, though.
i use theunlockr.com.
graemegb said:
i use theunlockr.com.
Click to expand...
Click to collapse
that site sucks. they don't have a link on the home page to buy unlocked codes, i had to go to "unlocking 101" under "wireless 101" and from there visit the "unlock for free" which tells you to call your provider after 3 months and at the end says "we sell them too", i tried the link: http://theunlockr.com/store/unlock-my-phone/ and it doesn't even load.
Posting specifically in the MTATRIX4G forum (probably could have got away with the general forum)...
Looking to unlock my Motorola Atrix 4G to work on all networks. Couldn't find a guide....
There are guides everywhere. It seems you fail at basic searching.
Call AT&T and ask for code, or buy the code online.
Why would I call AT&T? Not everyone in the world lives in United States of....Something (to be blunt my carrier is Orange in UK, look it up on a map - unless AT&T are so generous that they would accept my IMEI, even though i'm not with AT&T?? That would be generous of them)
Let me rephrase - plenty of people selling unlock codes and plenty of dodgy software where you need to fill out some weird survery (never going to do that as it's always a con).
So point taken, let's rephrase again - Can someone help me find open source software to unlock the Motorola Atrix 4G?
Atrix 4G is only available on AT&T. Elsewhere in the world it is called Atrix, not Atrix 4G. Since you keep mentioning Atrix 4G, I naturally assumed you're on AT&T. No need to get rude, next time try being more precise instead.
In that case, you'll have to buy the code online. A way to unlock "at home" does not exist. I have no recommendations for a good unlocking site, wait for someone else to chime in.
Good point, will take it onboard. I had suspected buying an unlock code (which I don't mind per say as it's going on ebay anyway and adds to the value). Unless someone else has a plausable trusthworth site i'll bid thee farewell.
Widodude said:
Good point, will take it onboard. I had suspected buying an unlock code (which I don't mind per say as it's going on ebay anyway and adds to the value). Unless someone else has a plausable trusthworth site i'll bid thee farewell.
Click to expand...
Click to collapse
I think you lost that auction.
Get unlock multiple try
It also depend on the Radio.
I have the ATT unclock code for my phone but everytime I try it show unsuccessful. I have to flash my back to original ATT radio and try and now my network it unlocked. It depend your service provider, just fash the correct radio and get the code online should working fine.
AndroidDevGru said:
I think you lost that auction.
Click to expand...
Click to collapse
What I meant was, i sold my old HTC Touch HD and got an additional 20% on the price as opposed to locked to Orange. People just prefer an unlocked device to buy. Simples really.
Asianhood said:
It also depend on the Radio.
I have the ATT unclock code for my phone but everytime I try it show unsuccessful. I have to flash my back to original ATT radio and try and now my network it unlocked. It depend your service provider, just fash the correct radio and get the code online should working fine.
Click to expand...
Click to collapse
Yup, plenty of choices online, range from 8 quid to 20, i'll just use the one I used last time (althought this time I got greedy and looked for a free option )
Weird ATT provide it for free, Orange in the UK charge a flat rate of about 23 quid (and only if you're in contract with them)
Asianhood said:
It also depend on the Radio.
I have the ATT unclock code for my phone but everytime I try it show unsuccessful. I have to flash my back to original ATT radio and try and now my network it unlocked. It depend your service provider, just fash the correct radio and get the code online should working fine.
Click to expand...
Click to collapse
Another thing to keep in mind is that some of us could not unlock with any AT&T radio at all. On my phone, I had to flash the Bell Canada radio before AT&T's unlock code would work. Of course, I flashed back to AT&T's radios and the phone remained unlocked. Just something to keep in mind.
Hi, does unlocking my cellphone to make it work with all companies lock it in my country? My cellphone is from Chile, I talk with Claro there. I am in Canada and I want to unlock it to Bell or any other companies. If I had it unlocked for Bell, would it work back home?
Ps. if you know of any unlocking services would you please tell me. Thanks :good:
carranzero said:
If I had it unlocked for Bell, would it work back home?
Click to expand...
Click to collapse
Yes once it is unlocked it will work with any GSM carrier in the world. I am assuming you are talking about a GSM phone here.
Besides unlocking services, usually your home carrier will give you the unlock code for free and the instructions of where to enter in that code in your phone to unlock it, if you tell them you need to unlock it because you are traveling abroad. Usually they want you to have owned the phone for a while (like 6 months for some carriers) before they give you the code though. No harm in trying to ask the customer care.
I asked my home carrier for a unlocking code, they said they would contact the cellphone manufacturer and get it in about 3 weeks, which is too long. Does anyone know of another faster option? Thanks... If I can do it by myself that would be excellent too
Hey thanks for the great information but you know what, I couldn't find my device there... it's a Moto G!
Do you know of other good sites to unlock? Thanks!
rizi7654321 said:
The site i mention above is 100% reliable with fastest time frame. Give it a shot and you won't regret ever.
Click to expand...
Click to collapse
I don't use iPhone, sorry, I use Moto G
alright, well i dont know which carrier my cellphone is locked to since i bought it to a friend who bought it from another friend in Chile and in chile the phones are unlocked to all chilean companies...anyways I contacted motorola and they said they could provide the subsidy code in 72 hours... ill let you know
hey, Motorola actually called me and gave me 2 subsidy codes and none worked....!!!! i actually double checked the IMEI number and they said it was correct, so I guess i'll have to use one of them unlock websites.... does anyone knows if eBay is safe to do that?
many thanks =)
Hi guys, I just attended the Samsung Developer Conference at San Francisco and gave us a Gears S as a gift. The device seems to be sim locked for ATT. I contacted Samsung and ATT and they know nothing about that and could offer me any solution. Hoping there's some other attendees hanging at xda, Does anybody was able to solve this problem?
Thanks
lglossman said:
Hi guys, I just attended the Samsung Developer Conference at San Francisco and gave us a Gears S as a gift. The device seems to be sim locked for ATT. I contacted Samsung and ATT and they know nothing about that and could offer me any solution. Hoping there's some other attendees hanging at xda, Does anybody was able to solve this problem?
Thanks
Click to expand...
Click to collapse
I did not attend that confrence lucky you. Yes it is sim locked you can unlock it if you choose to under certain conditions. Did they mention any new gear apps to come?
What are those conditions? They didn't announced any official app but there was an app contest with some interesting apps though.
lglossman said:
What are those conditions? They didn't announced any official app but there was an app contest with some interesting apps though.
Click to expand...
Click to collapse
If you are a AT&T customer/former customer(i e have.had a number) your good you can request unlock code. If your new you have to be with them for x amount of days (40 or so). Or find someone willing to add it to their account so you can unlock assuming you've paid outright. If you were never a customer YMMV but most likely no unless they feel like it then it will be emailed to you
Uniquebarbee said:
If you are a AT&T customer/former customer(i e have.had a number) your good you can request unlock code. If your new you have to be with them for x amount of days (40 or so). Or find someone willing to add it to their account so you can unlock assuming you've paid outright. If you were never a customer YMMV but most likely no unless they feel like it then it will be emailed to you
Click to expand...
Click to collapse
I'm from Argentina so I guess the only option would be to find someone from US who is a ATT customer willing to do the work for me. If any reads these and want to give me a hand with these please contact me via PM.
Typically, the conference organizer will give you instructions about how to obtain a unlock code from them directly. Calling AT&T directly won't help.
foxbat121 said:
Typically, the conference organizer will give you instructions about how to obtain a unlock code from them directly. Calling AT&T directly won't help.
Click to expand...
Click to collapse
Sadly I wasn't contacted by Samsung. I even tried calling Samsung customer support and they have no idea. I still have hope that some other attendee who was able to unlock the device is reading this...
Sent from my iPhone using Tapatalk
lglossman said:
Sadly I wasn't contacted by Samsung. I even tried calling Samsung customer support and they have no idea. I still have hope that some other attendee who was able to unlock the device is reading this...
Click to expand...
Click to collapse
That's where mine came from - I was there. Wow, the demo gods did not smile on Samsung
Anyway, no - no info was given, and I honestly doubt any thought was given to how to unlock these "dev" phones for non-AT&T customers. I happen to be on AT&T should I want to use a sim in mine.
If you register on the AT&T forums http://forums.att.com/ then you can send a PM to ATTCustomerCare (http://forums.att.com/t5/notes/privatenotespage/tab/compose/note-to-user-id/192773) and tell them the situation. That team has been the go-to team for "edge case" unlocks. Alternately you can keep trying to call the support number until you reach a supervisor who can ok the unlock, but essentially you're reaching those same people via the forum without the hassle of endlessly calling.
You can get it unlocked using cell unlocker. It took them a few days but they finally sent me an unlock code that worked first try.
I must have been the first one they did because they kept sending me emails asking I had tried it yet. Because I was travelling I had to wait a couple if days.
Sent from my SM-G900W8 using XDA Free mobile app
We're in the same boat. Maybe we can help?
lglossman said:
I still have hope that some other attendee who was able to unlock the device is reading this...
Click to expand...
Click to collapse
My fiancé and I are in the same situation. We also got the watches at the Samsung Dev Con, but we're T-Mobile customers. (Also, did you notice that the Note 4s they raffled off were for Verizon?) We already tried calling AT&T, to no avail, and now I've posted on their forums asking for help and I'm sending the customer care people a PM, as recommended in this thread.
Worst case scenario, we get our friend (an AT&T customer) to get the unlock codes. But if it comes to that, we can probably get yours unlocked with ours, if you want. We're happy to help.
I'll post an update if the customer care PM works.
Last time I was at an Microsoft event and with the AT&T phone they gave me, there is a note inside told me to email someone with IMEI for unlock. I did and they quickly email back with unlock code. You should contact your meeting organizer, not AT&T or Samsung support as they have no clue.
foxbat121 said:
Last time I was at an Microsoft event and with the AT&T phone they gave me, there is a note inside told me to email someone with IMEI for unlock. I did and they quickly email back with unlock code. You should contact your meeting organizer, not AT&T or Samsung support as they have no clue.
Click to expand...
Click to collapse
If you are not an AT&T customer and are on T-Mobile or Sprint, I would recommend selling the AT&T version and getting one from your Carrier that way the Radio Bands will work for you.
If you are out of country, I would recommend selling the AT&T USA Version as some others have posted where they can't get apps if the Country doesn't match their Phone, or something like that.
That being said, if you are looking at selling the AT&T one cheap, send me a PM. I bought one, had it about 6 hours before the wife confiscated it for her selfish purposes.
segura.org said:
If you are not an AT&T customer and are on T-Mobile or Sprint, I would recommend selling the AT&T version and getting one from your Carrier that way the Radio Bands will work for you.
If you are out of country, I would recommend selling the AT&T USA Version as some others have posted where they can't get apps if the Country doesn't match their Phone, or something like that.
That being said, if you are looking at selling the AT&T one cheap, send me a PM. I bought one, had it about 6 hours before the wife confiscated it for her selfish purposes.
Click to expand...
Click to collapse
Seems you wanted his GS all along
Sword Fish said:
You can get it unlocked using cell unlocker. It took them a few days but they finally sent me an unlock code that worked first try.
I must have been the first one they did because they kept sending me emails asking I had tried it yet. Because I was travelling I had to wait a couple if days.
Sent from my SM-G900W8 using XDA Free mobile app
Click to expand...
Click to collapse
I just did it and it worked like charm!!! Thanks for the information...
VeganGeekChick said:
My fiancé and I are in the same situation. We also got the watches at the Samsung Dev Con, but we're T-Mobile customers. (Also, did you notice that the Note 4s they raffled off were for Verizon?) We already tried calling AT&T, to no avail, and now I've posted on their forums asking for help and I'm sending the customer care people a PM, as recommended in this thread.
Worst case scenario, we get our friend (an AT&T customer) to get the unlock codes. But if it comes to that, we can probably get yours unlocked with ours, if you want. We're happy to help.
I'll post an update if the customer care PM works.
Click to expand...
Click to collapse
Hey men, thanks a lot for the offering. I just unlocked via cellunlocker.net, price seemed fair...
lglossman said:
I just did it and it worked like charm!!! Thanks for the information...
Hey men, thanks a lot for the offering. I just unlocked via cellunlocker.net, price seemed fair...
Click to expand...
Click to collapse
Hey guys has anyone tried SIM unlocking the T-Mobile Gear S I just got one. Would like to know if I unlock it will it fully work on AT&T? I've used cellunlocker.net in the past. They are great. I just don't want to unlock it and it not work on AT&T.
Skolar72 said:
Hey guys has anyone tried SIM unlocking the T-Mobile Gear S I just got one. Would like to know if I unlock it will it fully work on AT&T? I've used cellunlocker.net in the past. They are great. I just don't want to unlock it and it not work on AT&T.
Click to expand...
Click to collapse
In theory it should work just as a unlocked phone would on whatever network so any problems you have with unlock on AT&T will be the same like how they handle messages
Uniquebarbee said:
In theory it should work just as a unlocked phone would on whatever network so any problems you have with unlock on AT&T will be the same like how they handle messages
Click to expand...
Click to collapse
So you think the SMS/MMS wouldn't work?
Non-us SDC participants beware of GSM-bands if you are European
lglossman said:
I'm from Argentina so I guess the only option would be to find someone from US who is a ATT customer willing to do the work for me. If any reads these and want to give me a hand with these please contact me via PM.
Click to expand...
Click to collapse
I am from Norway and got mine at the Samsung Developer Conference. I unlocked mine using cellunlocker.net. I received the network lock code less than an hour after submitting the order and it worked like a charm.
HOWEVER: For other non-US-citizens, you need to check whether the AT&T-device has support for your local GSM-bands. Here in Norway we have GSM 900/1800 and the AT&T device is only GSM 850/1900 from what I can find on the net. Which matches my end result of not being able to connect to my network even after unlocking.
Skolar72 said:
So you think the SMS/MMS wouldn't work?
Click to expand...
Click to collapse
It will work some people are saying that sms you have to use AT&T messenger I'm not sure but everything should work as a unlocked phone on AT&T
jonstenerud said:
I am from Norway and got mine at the Samsung Developer Conference. I unlocked mine using cellunlocker.net. I received the network lock code less than an hour after submitting the order and it worked like a charm.
HOWEVER: For other non-US-citizens, you need to check whether the AT&T-device has support for your local GSM-bands. Here in Norway we have GSM 900/1800 and the AT&T device is only GSM 850/1900 from what I can find on the net. Which matches my end result of not being able to connect to my network even after unlocking.
Click to expand...
Click to collapse
850/1900 bands are for North America only. Only two other countries outside of North America use also use these two bands: Brazil and Australia.
Uniquebarbee said:
It will work some people are saying that sms you have to use AT&T messenger I'm not sure but everything should work as a unlocked phone on AT&T
Click to expand...
Click to collapse
That's not right. If you use AT&T messenger on the phone (as AT&T wants you to do), you will not be able to reply from the watch. So, you will have to switch back to the Samsung stock Messages app.
MMS might be a problem but regular text SMS won't be a problem. For MMS, you may need to add AT&T MMS APN.