Tutor
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9 Messages
Oneplus with new ATT SIM card unable to use LTE/4G
A phone Oneplus with new ATT SIM card unable to use LTE/4G , the IMEI number is [edited for privacy-please do not post personal or unique information such as but not limited to full names, employee ID numbers, email addresses, phone numbers, account numbers, etc.]. No LTE connecting fot it but only 3G .
what happen to this situation ?
jt212s
Professor
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1.1K Messages
8 years ago
Hi @whataburger, is your phone the OnePlus 3 or a different OnePlus model?
Assuming it's the OnePlus 3, do you happen to know if you ended up with the North American model or somehow may have ended up with the Europe/Asia model?
Looking at the specs, the NA model supports LTE bands 1, 2, 4, 5, 7, 12/17, 30, which should cover you on the AT&T network. The E/A model however has LTE bands 1, 3, 5, 7, 8, 20, 38, and 40 which would not cover any of AT&T's bands (2, 4, 12/17, and 30). The China model also only has bands 1, 3, 7, 38, 39, 40, and 41, so it also wouldn't have any of the AT&T LTE bands.
Other than that, I know you said it's a new SIM card. Did you do a BYOP (bring your own phone) and start service with AT&T with the OnePlus phone?
Justin
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GLIMMERMAN76
ACE - Expert
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23.9K Messages
8 years ago
@jt212s
you forgot band 5 for ATT. ATT runs LTE on Band 2 and 5 in the entire State of Vermont. Also there is a problem with how one plus coded there IMEI numbers just like ASUS did with the zen 2. The att system is detecting its a 3g only device.
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whataburger
Tutor
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9 Messages
8 years ago
And I noticed the seller is registering oneplus 3 phone IMEI number when I bought the SIM card, is it meaning sth ?
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whataburger
Tutor
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9 Messages
8 years ago
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GLIMMERMAN76
ACE - Expert
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23.9K Messages
8 years ago
THere is not much info on your IMEI
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whataburger
Tutor
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9 Messages
8 years ago
many thanks for internal check , i noted it mentioned 'The TAC info not found on database' , is it regarding the TAC = type allocation code ?
and besides , yetherday morning the phone unable to use LTE no matter what i tried , but around 12 hours later i was back to hotel and restared phone occasionally and switch the mode by open/close the 'airplane mode' it succeed to connect the LTE until now .
it's so weird i cound't know how it is working from failed in the morning to success in the night , as all the day i try connecting without stopping.
is it because in the morning IMEI not in ATT database , but in the night it has been registered ?
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jt212s
Professor
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1.1K Messages
8 years ago
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whataburger
Tutor
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9 Messages
8 years ago
The manufactures has told me that the phone included band 5 and and 2 so it means not a compatible issue between phone and ATT, can you please check why with this IMEI it can not use lTE ?
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Geckohazard
Contributor
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3 Messages
8 years ago
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