# hiding sms sender number **URL:** \ **Category:** Legacy FX/FXT series\ **Created:** [May 13, 2009, 2:32pm UTC](https://forum.sierrawireless.com/t/hiding-sms-sender-number/3233 "2009-05-13T14:32:55Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![zafer](https://avatars.discourse-cdn.com/v4/letter/z/439d5e/32.png) [@zafer](https://forum.sierrawireless.com/u/zafer)\ **Post date:** [May 13, 2009, 2:32pm UTC](https://forum.sierrawireless.com/t/hiding-sms-sender-number/3233/1 "2009-05-13T14:32:55Z")
hi, is it possible to hide or change sender number when sending sms? so that ppl who receives smses can not disturb modem by calling that number or somethingelse? ---
**Author:** ![awneil](https://avatars.discourse-cdn.com/v4/letter/a/49beb7/32.png) [@awneil](https://forum.sierrawireless.com/u/awneil)\ **Post date:** [May 13, 2009, 9:19pm UTC](https://forum.sierrawireless.com/t/hiding-sms-sender-number/3233/2 "2009-05-13T21:19:30Z")
> [@zafer](#): > > so that ppl who receives smses can not disturb modem by calling that number or somethingelse? If you are concerned about that, then don’t send from a modem - use a gateway service. ---
**Author:** ![zafer](https://avatars.discourse-cdn.com/v4/letter/z/439d5e/32.png) [@zafer](https://forum.sierrawireless.com/u/zafer)\ **Post date:** [May 14, 2009, 4:43am UTC](https://forum.sierrawireless.com/t/hiding-sms-sender-number/3233/3 "2009-05-14T04:43:59Z")
i keep in mind using gateway service but i just tried to find a way to do it by open at. i guess there is no way with open at. is there? ---
**Author:** ![Madouc](https://avatars.discourse-cdn.com/v4/letter/m/b782af/32.png) [@Madouc](https://forum.sierrawireless.com/u/Madouc)\ **Post date:** [May 14, 2009, 6:14am UTC](https://forum.sierrawireless.com/t/hiding-sms-sender-number/3233/4 "2009-05-14T06:14:55Z")
another option might be to use data-only sim-cards. if you call their number from a normal phone your call gets blocked by the operator (in my experience) ---
**Author:** ![awneil](https://avatars.discourse-cdn.com/v4/letter/a/49beb7/32.png) [@awneil](https://forum.sierrawireless.com/u/awneil)\ **Post date:** [May 14, 2009, 6:58am UTC](https://forum.sierrawireless.com/t/hiding-sms-sender-number/3233/5 "2009-05-14T06:58:43Z")
> [@zafer](#): > > i guess there is no way with open at. is there? I don’t think it has anything to do with Open-AT - I just don’t think the networks support it? ---
**Author:** ![awneil](https://avatars.discourse-cdn.com/v4/letter/a/49beb7/32.png) [@awneil](https://forum.sierrawireless.com/u/awneil)\ **Post date:** [May 14, 2009, 7:04am UTC](https://forum.sierrawireless.com/t/hiding-sms-sender-number/3233/6 "2009-05-14T07:04:13Z")
> [@Madouc](#): > > another option might be to use data-only sim-cards. if you call their number from a normal phone your call gets blocked by the operator (in my experience) In my experience (UK networks), it is still possible to send SMS to a data number. It may well be network-specific, and there may well be providers that can offer special services to do this sort of thing… But, as long as your device has a phone number, there is no way to prevent anyone from entering its number when sending a text - whether they do it accidentally, or in some deliberate attempt to find out if the number is “live”. Therefore your application must be resilient to receiving “unwanted” texts… ---
**Author:** ![zafer](https://avatars.discourse-cdn.com/v4/letter/z/439d5e/32.png) [@zafer](https://forum.sierrawireless.com/u/zafer)\ **Post date:** [May 14, 2009, 7:22am UTC](https://forum.sierrawireless.com/t/hiding-sms-sender-number/3233/7 "2009-05-14T07:22:37Z")
hi, i have data sim card on the modem. and when i try to call the modem from a mobile phone, i can not hear call ring tone on the phone but i can see that it is ringing on the modem. i watched that by hyperterminal. it rings 20 times and closes itself (no answer). so if i use datasim, ppl wont realise that they are calling the modem, but actually they can call until 20 rings indication on the modem. Also i get to know that there is no way to hide number when sending sms if you dont use something like gateway,sms service. If i send ATH command when i get RING indication from the modem, then that can be the way to keep modem not busy. I can not find any better solution yet. ---
**Author:** ![awneil](https://avatars.discourse-cdn.com/v4/letter/a/49beb7/32.png) [@awneil](https://forum.sierrawireless.com/u/awneil)\ **Post date:** [May 14, 2009, 8:30am UTC](https://forum.sierrawireless.com/t/hiding-sms-sender-number/3233/8 "2009-05-14T08:30:52Z")
> [@zafer](#): > > i get to know that there is no way to hide number when sending sms Have you actually confirmed that officially, or are you just taking my word for it? I only said that I think this is the case - if you have some concrete evidence, it would be useful to share it… Also whether it is a Universal Truth, or operator-specific ---
**Author:** ![zafer](https://avatars.discourse-cdn.com/v4/letter/z/439d5e/32.png) [@zafer](https://forum.sierrawireless.com/u/zafer)\ **Post date:** [May 14, 2009, 8:52am UTC](https://forum.sierrawireless.com/t/hiding-sms-sender-number/3233/9 "2009-05-14T08:52:33Z")
that is my opinion. i havent confirmed that offically. I will try to contact the operator but i m hopeless. Bc operator services dont give much information or solution. They may advice to use one of their sms service. But that may cost extra.