Leveraging Low-Cost 4G Hotspots to Enable Dedicated SMS/OTP Devices
Problem
Users want to view SMS and one-time passwords without relying on a smartphone, requiring a standalone device with longer battery life; current solutions involve frequent SIM card swapping or opening a web page on a laptop, and suffer from insufficient battery life.
Pain points
- Lack of a dedicated SMS/OTP viewing device
- Existing hotspot devices have short battery life
- Need to frequently swap SIM cards or use a laptop to open a web interface
Questions to verify
- Do you currently frequently use a similar hotspot device as an independent SMS viewing tool?
- Are you interested in extending battery life through modifications such as parallel 18650 batteries?
- Would you be willing to pay a higher price for a dedicated SMS/OTP device?
Evidence
quote · @匿名
I often ditch my phone and carry my hotspot device for my internet. The only drawback is that for viewing my texts and OTPs i end up putting the sim in my phone or opening up the web interface on my laptop.
quote · @匿名
Based on the work the person has done, if they wanted to make something with an exceedingly long battery life, and the battery setup there already seems to be basically a 1S li ion, they could graft in a back side battery holder for two high quality 18650 cells in parallel. It would probably last weeks.
fact
Hacking a $20 4G wireless hotspot into a texting device
Disclaimer: this card is distilled by AI from community discussions as “pain point evidence”. It is a starting point for need analysis and validation, not a “validated market need”. AI has analytical limits; please open the original discussion above to manually verify before key decisions.